Simultaneous bandwidth parts switching

ABSTRACT

A wireless device receives one or more first radio resource control (RRC) messages. The first RRC messages comprise one or more configuration parameters of a first cell and a second cell. A second RRC message is received. The second RRC message indicates a first change of a first active bandwidth part (BWP) of the first cell. Processing of the second RRC message is completed. A determination is made that the completing occurs during a time duration of a second change of a second active BWP of the second cell. Based on the determining, the first change of the first active BWP is delayed until the second change of the second active BWP is completed.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims the benefit of U.S. Provisional Application No.62/787,592, filed Jan. 2, 2019, which is hereby incorporated byreference in its entirety.

BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWINGS

Examples of several of the various embodiments of the present disclosureare described herein with reference to the drawings.

FIG. 1 is a diagram of an example RAN architecture as per an aspect ofan embodiment of the present disclosure.

FIG. 2A is a diagram of an example user plane protocol stack as per anaspect of an embodiment of the present disclosure.

FIG. 2B is a diagram of an example control plane protocol stack as peran aspect of an embodiment of the present disclosure.

FIG. 3 is a diagram of an example wireless device and two base stationsas per an aspect of an embodiment of the present disclosure.

FIG. 4A, FIG. 4B, FIG. 4C and FIG. 4D are example diagrams for uplinkand downlink signal transmission as per an aspect of an embodiment ofthe present disclosure.

FIG. 5A is a diagram of an example uplink channel mapping and exampleuplink physical signals as per an aspect of an embodiment of the presentdisclosure.

FIG. 5B is a diagram of an example downlink channel mapping and exampledownlink physical signals as per an aspect of an embodiment of thepresent disclosure.

FIG. 6 is a diagram depicting an example transmission time or receptiontime for a carrier as per an aspect of an embodiment of the presentdisclosure.

FIG. 7A and FIG. 7B are diagrams depicting example sets of OFDMsubcarriers as per an aspect of an embodiment of the present disclosure.

FIG. 8 is a diagram depicting example OFDM radio resources as per anaspect of an embodiment of the present disclosure.

FIG. 9A is a diagram depicting an example CSI-RS and/or SS blocktransmission in a multi-beam system.

FIG. 9B is a diagram depicting an example downlink beam managementprocedure as per an aspect of an embodiment of the present disclosure.

FIG. 10 is an example diagram of configured bandwidth parts (BWPs) asper an aspect of an embodiment of the present disclosure.

FIG. 11A, and FIG. 11B are diagrams of an example multi connectivity asper an aspect of an embodiment of the present disclosure.

FIG. 12 is a diagram of an example random access procedure as per anaspect of an embodiment of the present disclosure.

FIG. 13 is a structure of example MAC entities as per an aspect of anembodiment of the present disclosure.

FIG. 14 is a diagram of an example RAN architecture as per an aspect ofan embodiment of the present disclosure.

FIG. 15 is a diagram of example RRC states as per an aspect of anembodiment of the present disclosure.

FIG. 16 is an example of a BWP operation as per an aspect of anembodiment of the present disclosure.

FIG. 17 is an example of a BWP operation as per an aspect of anembodiment of the present disclosure.

FIG. 18 is an example of a BWP operation as per an aspect of anembodiment of the present disclosure.

FIG. 19 is an example of a BWP operation as per an aspect of anembodiment of the present disclosure.

FIG. 20 is an example of a BWP operation as per an aspect of anembodiment of the present disclosure.

FIG. 21 is an example of a BWP operation as per an aspect of anembodiment of the present disclosure.

FIG. 22 is an example of a BWP operation as per an aspect of anembodiment of the present disclosure.

FIG. 23 is an example of a BWP operation as per an aspect of anembodiment of the present disclosure.

FIG. 24 is an example flowchart of a BWP operation as per an aspect ofan embodiment of the present disclosure.

FIG. 25 is an example flowchart of a BWP operation as per an aspect ofan embodiment of the present disclosure.

FIG. 26 is an example flowchart of a BWP operation as per an aspect ofan embodiment of the present disclosure.

FIG. 27 is an example flowchart of a BWP operation as per an aspect ofan embodiment of the present disclosure.

FIG. 28 is a flow diagram of an aspect of an example embodiment of thepresent disclosure.

DETAILED DESCRIPTION OF EMBODIMENTS

Example embodiments of the present disclosure enable operation ofbandwidth parts. Embodiments of the technology disclosed herein may beemployed in the technical field of multicarrier communication systems.More particularly, the embodiments of the technology disclosed hereinmay relate to bandwidth parts in a multicarrier communication system.

The following Acronyms are used throughout the present disclosure:

3GPP 3rd Generation Partnership Project

5GC 5G Core Network

ACK Acknowledgement

AMF Access and Mobility Management Function

ARQ Automatic Repeat Request

AS Access Stratum

ASIC Application-Specific Integrated Circuit

BA Bandwidth Adaptation

BCCH Broadcast Control Channel

BCH Broadcast Channel

BPSK Binary Phase Shift Keying

BWP Bandwidth Part

CA Carrier Aggregation

CC Component Carrier

CCCH Common Control CHannel

CDMA Code Division Multiple Access

CN Core Network

CP Cyclic Prefix

CP-OFDM Cyclic Prefix-Orthogonal Frequency Division Multiplex

C-RNTI Cell-Radio Network Temporary Identifier

CS Configured Scheduling

CSI Channel State Information

CSI-RS Channel State Information-Reference Signal

CQI Channel Quality Indicator

CSS Common Search Space

CU Central Unit

DC Dual Connectivity

DCCH Dedicated Control Channel

DCI Downlink Control Information

DL Downlink

DL-SCH Downlink Shared CHannel

DM-RS DeModulation Reference Signal

DRB Data Radio Bearer

DRX Discontinuous Reception

DTCH Dedicated Traffic Channel

DU Distributed Unit

EPC Evolved Packet Core

E-UTRA Evolved UMTS Terrestrial Radio Access

E-UTRAN Evolved-Universal Terrestrial Radio Access Network

FDD Frequency Division Duplex

FPGA Field Programmable Gate Arrays

F1-C F1-Control plane

F1-U F1-User plane

gNB next generation Node B

HARQ Hybrid Automatic Repeat reQuest

HDL Hardware Description Languages

IE Information Element

IP Internet Protocol

LCID Logical Channel Identifier

LTE Long Term Evolution

MAC Media Access Control

MCG Master Cell Group

MCS Modulation and Coding Scheme

MeNB Master evolved Node B

MIB Master Information Block

MME Mobility Management Entity

MN Master Node

NACK Negative Acknowledgement

NAS Non-Access Stratum

NG CP Next Generation Control Plane

NGC Next Generation Core

NG-C NG-Control plane

ng-eNB next generation evolved Node B

NG-U NG-User plane

NR New Radio

NR MAC New Radio MAC

NR PDCP New Radio PDCP

NR PHY New Radio PHYsical

NR RLC New Radio RLC

NR RRC New Radio RRC

NSSAI Network Slice Selection Assistance Information

O&M Operation and Maintenance

OFDM orthogonal Frequency Division Multiplexing

PBCH Physical Broadcast CHannel

PCC Primary Component Carrier

PCCH Paging Control CHannel

PCell Primary Cell

PCH Paging CHannel

PDCCH Physical Downlink Control CHannel

PDCP Packet Data Convergence Protocol

PDSCH Physical Downlink Shared CHannel

PDU Protocol Data Unit

PHICH Physical HARQ Indicator CHannel

PHY PHYsical

PLMN Public Land Mobile Network

PMI Precoding Matrix Indicator

PRACH Physical Random Access CHannel

PRB Physical Resource Block

PSCell Primary Secondary Cell

PSS Primary Synchronization Signal

pTAG primary Timing Advance Group

PT-RS Phase Tracking Reference Signal

PUCCH Physical Uplink Control CHannel

PUSCH Physical Uplink Shared CHannel

QAM Quadrature Amplitude Modulation

QFI Quality of Service Indicator

QoS Quality of Service

QPSK Quadrature Phase Shift Keying

RA Random Access

RACH Random Access CHannel

RAN Radio Access Network

RAT Radio Access Technology

RA-RNTI Random Access-Radio Network Temporary Identifier

RB Resource Blocks

RBG Resource Block Groups

RI Rank indicator

RLC Radio Link Control

RRC Radio Resource Control

RS Reference Signal

RSRP Reference Signal Received Power

SCC Secondary Component Carrier

SCell Secondary Cell

SCG Secondary Cell Group

SC-FDMA Single Carrier-Frequency Division Multiple Access

SDAP Service Data Adaptation Protocol

SDU Service Data Unit

SeNB Secondary evolved Node B

SFN System Frame Number

S-GW Serving GateWay

SI System Information

SIB System Information Block

SMF Session Management Function

SN Secondary Node

SpCell Special Cell

SRB Signaling Radio Bearer

SRS Sounding Reference Signal

SS Synchronization Signal

SSS Secondary Synchronization Signal

sTAG secondary Timing Advance Group

TA Timing Advance

TAG Timing Advance Group

TAI Tracking Area Identifier

TAT Time Alignment Timer

TB Transport Block

TC-RNTI Temporary Cell-Radio Network Temporary Identifier

TDD Time Division Duplex

TDMA Time Division Multiple Access

TTI Transmission Time Interval

UCI Uplink Control Information

UE User Equipment

UL Uplink

UL-SCH Uplink Shared CHannel

UPF User Plane Function

UPGW User Plane Gateway

VHDL VHSIC Hardware Description Language

Xn-C Xn-Control plane

Xn-U Xn-User plane

Example embodiments of the disclosure may be implemented using variousphysical layer modulation and transmission mechanisms. Exampletransmission mechanisms may include, but are not limited to: CodeDivision Multiple Access (CDMA), Orthogonal Frequency Division MultipleAccess (OFDMA), Time Division Multiple Access (TDMA), Wavelettechnologies, and/or the like. Hybrid transmission mechanisms such asTDMA/CDMA, and OFDM/CDMA may also be employed. Various modulationschemes may be applied for signal transmission in the physical layer.Examples of modulation schemes include, but are not limited to: phase,amplitude, code, a combination of these, and/or the like. An exampleradio transmission method may implement Quadrature Amplitude Modulation(QAM) using Binary Phase Shift Keying (BPSK), Quadrature Phase ShiftKeying (QPSK), 16-QAM, 64-QAM, 256-QAM, 1024-QAM, and/or the like.Physical radio transmission may be enhanced by dynamically orsemi-dynamically changing the modulation and coding scheme depending ontransmission requirements and radio conditions.

FIG. 1 is an example Radio Access Network (RAN) architecture as per anaspect of an embodiment of the present disclosure. As illustrated inthis example, a RAN node may be a next generation Node B (gNB) (e.g.120A, 120B) providing New Radio (NR) user plane and control planeprotocol terminations towards a first wireless device (e.g. 110A). In anexample, a RAN node may be a next generation evolved Node B (ng-eNB)(e.g. 120C, 120D), providing Evolved UMTS Terrestrial Radio Access(E-UTRA) user plane and control plane protocol terminations towards asecond wireless device (e.g. 110B). The first wireless device maycommunicate with a gNB over a Uu interface. The second wireless devicemay communicate with a ng-eNB over a Uu interface.

A gNB or an ng-eNB may host functions such as radio resource managementand scheduling, IP header compression, encryption and integrityprotection of data, selection of Access and Mobility Management Function(AMF) at User Equipment (UE) attachment, routing of user plane andcontrol plane data, connection setup and release, scheduling andtransmission of paging messages (originated from the AMF), schedulingand transmission of system broadcast information (originated from theAMF or Operation and Maintenance (O&M)), measurement and measurementreporting configuration, transport level packet marking in the uplink,session management, support of network slicing, Quality of Service (QoS)flow management and mapping to data radio bearers, support of UEs inRRC_INACTIVE state, distribution function for Non-Access Stratum (NAS)messages, RAN sharing, dual connectivity or tight interworking betweenNR and E-UTRA.

In an example, one or more gNBs and/or one or more ng-eNBs may beinterconnected with each other by means of Xn interface. A gNB or anng-eNB may be connected by means of NG interfaces to 5G Core Network(5GC). In an example, 5GC may comprise one or more AMF/User PlanFunction (UPF) functions (e.g. 130A or 130B). A gNB or an ng-eNB may beconnected to a UPF by means of an NG-User plane (NG-U) interface. TheNG-U interface may provide delivery (e.g. non-guaranteed delivery) ofuser plane Protocol Data Units (PDUs) between a RAN node and the UPF. AgNB or an ng-eNB may be connected to an AMF by means of an NG-Controlplane (NG-C) interface. The NG-C interface may provide functions such asNG interface management, UE context management, UE mobility management,transport of NAS messages, paging, PDU session management, configurationtransfer or warning message transmission.

In an example, a UPF may host functions such as anchor point forintra-/inter-Radio Access Technology (RAT) mobility (when applicable),external PDU session point of interconnect to data network, packetrouting and forwarding, packet inspection and user plane part of policyrule enforcement, traffic usage reporting, uplink classifier to supportrouting traffic flows to a data network, branching point to supportmulti-homed PDU session, QoS handling for user plane, e.g. packetfiltering, gating, Uplink (UL)/Downlink (DL) rate enforcement, uplinktraffic verification (e.g. Service Data Flow (SDF) to QoS flow mapping),downlink packet buffering and/or downlink data notification triggering.

In an example, an AMF may host functions such as NAS signalingtermination, NAS signaling security, Access Stratum (AS) securitycontrol, inter Core Network (CN) node signaling for mobility between3^(rd) Generation Partnership Project (3GPP) access networks, idle modeUE reachability (e.g., control and execution of paging retransmission),registration area management, support of intra-system and inter-systemmobility, access authentication, access authorization including check ofroaming rights, mobility management control (subscription and policies),support of network slicing and/or Session Management Function (SMF)selection.

FIG. 2A is an example user plane protocol stack, where Service DataAdaptation Protocol (SDAP) (e.g. 211 and 221), Packet Data ConvergenceProtocol (PDCP) (e.g. 212 and 222), Radio Link Control (RLC) (e.g. 213and 223) and Media Access Control (MAC) (e.g. 214 and 224) sublayers andPhysical (PHY) (e.g. 215 and 225) layer may be terminated in wirelessdevice (e.g. 110) and gNB (e.g. 120) on the network side. In an example,a PHY layer provides transport services to higher layers (e.g. MAC, RRC,etc.). In an example, services and functions of a MAC sublayer maycomprise mapping between logical channels and transport channels,multiplexing/demultiplexing of MAC Service Data Units (SDUs) belongingto one or different logical channels into/from Transport Blocks (TBs)delivered to/from the PHY layer, scheduling information reporting, errorcorrection through Hybrid Automatic Repeat request (HARQ) (e.g. one HARQentity per carrier in case of Carrier Aggregation (CA)), priorityhandling between UEs by means of dynamic scheduling, priority handlingbetween logical channels of one UE by means of logical channelprioritization, and/or padding. A MAC entity may support one or multiplenumerologies and/or transmission timings. In an example, mappingrestrictions in a logical channel prioritization may control whichnumerology and/or transmission timing a logical channel may use. In anexample, an RLC sublayer may supports transparent mode (TM),unacknowledged mode (UM) and acknowledged mode (AM) transmission modes.The RLC configuration may be per logical channel with no dependency onnumerologies and/or Transmission Time Interval (TTI) durations. In anexample, Automatic Repeat Request (ARQ) may operate on any of thenumerologies and/or TTI durations the logical channel is configuredwith. In an example, services and functions of the PDCP layer for theuser plane may comprise sequence numbering, header compression anddecompression, transfer of user data, reordering and duplicatedetection, PDCP PDU routing (e.g. in case of split bearers),retransmission of PDCP SDUs, ciphering, deciphering and integrityprotection, PDCP SDU discard, PDCP re-establishment and data recoveryfor RLC AM, and/or duplication of PDCP PDUs. In an example, services andfunctions of SDAP may comprise mapping between a QoS flow and a dataradio bearer. In an example, services and functions of SDAP may comprisemapping Quality of Service Indicator (QFI) in DL and UL packets. In anexample, a protocol entity of SDAP may be configured for an individualPDU session.

FIG. 2B is an example control plane protocol stack where PDCP (e.g. 233and 242), RLC (e.g. 234 and 243) and MAC (e.g. 235 and 244) sublayersand PHY (e.g. 236 and 245) layer may be terminated in wireless device(e.g. 110) and gNB (e.g. 120) on a network side and perform service andfunctions described above. In an example, RRC (e.g. 232 and 241) may beterminated in a wireless device and a gNB on a network side. In anexample, services and functions of RRC may comprise broadcast of systeminformation related to AS and NAS, paging initiated by 5GC or RAN,establishment, maintenance and release of an RRC connection between theUE and RAN, security functions including key management, establishment,configuration, maintenance and release of Signaling Radio Bearers (SRBs)and Data Radio Bearers (DRBs), mobility functions, QoS managementfunctions, UE measurement reporting and control of the reporting,detection of and recovery from radio link failure, and/or NAS messagetransfer to/from NAS from/to a UE. In an example, NAS control protocol(e.g. 231 and 251) may be terminated in the wireless device and AMF(e.g. 130) on a network side and may perform functions such asauthentication, mobility management between a UE and a AMF for 3GPPaccess and non-3GPP access, and session management between a UE and aSMF for 3GPP access and non-3GPP access.

In an example, a base station may configure a plurality of logicalchannels for a wireless device. A logical channel in the plurality oflogical channels may correspond to a radio bearer and the radio bearermay be associated with a QoS requirement. In an example, a base stationmay configure a logical channel to be mapped to one or moreTTIs/numerologies in a plurality of TTIs/numerologies. The wirelessdevice may receive a Downlink Control Information (DCI) via PhysicalDownlink Control CHannel (PDCCH) indicating an uplink grant. In anexample, the uplink grant may be for a first TTI/numerology and mayindicate uplink resources for transmission of a transport block. Thebase station may configure each logical channel in the plurality oflogical channels with one or more parameters to be used by a logicalchannel prioritization procedure at the MAC layer of the wirelessdevice. The one or more parameters may comprise priority, prioritizedbit rate, etc. A logical channel in the plurality of logical channelsmay correspond to one or more buffers comprising data associated withthe logical channel. The logical channel prioritization procedure mayallocate the uplink resources to one or more first logical channels inthe plurality of logical channels and/or one or more MAC ControlElements (CEs). The one or more first logical channels may be mapped tothe first TTI/numerology. The MAC layer at the wireless device maymultiplex one or more MAC CEs and/or one or more MAC SDUs (e.g., logicalchannel) in a MAC PDU (e.g., transport block). In an example, the MACPDU may comprise a MAC header comprising a plurality of MAC sub-headers.A MAC sub-header in the plurality of MAC sub-headers may correspond to aMAC CE or a MAC SUD (logical channel) in the one or more MAC CEs and/orone or more MAC SDUs. In an example, a MAC CE or a logical channel maybe configured with a Logical Channel IDentifier (LCID). In an example,LCID for a logical channel or a MAC CE may be fixed/pre-configured. Inan example, LCID for a logical channel or MAC CE may be configured forthe wireless device by the base station. The MAC sub-headercorresponding to a MAC CE or a MAC SDU may comprise LCID associated withthe MAC CE or the MAC SDU.

In an example, a base station may activate and/or deactivate and/orimpact one or more processes (e.g., set values of one or more parametersof the one or more processes or start and/or stop one or more timers ofthe one or more processes) at the wireless device by employing one ormore MAC commands. The one or more MAC commands may comprise one or moreMAC control elements. In an example, the one or more processes maycomprise activation and/or deactivation of PDCP packet duplication forone or more radio bearers. The base station may transmit a MAC CEcomprising one or more fields, the values of the fields indicatingactivation and/or deactivation of PDCP duplication for the one or moreradio bearers. In an example, the one or more processes may compriseChannel State Information (CSI) transmission of on one or more cells.The base station may transmit one or more MAC CEs indicating activationand/or deactivation of the CSI transmission on the one or more cells. Inan example, the one or more processes may comprise activation ordeactivation of one or more secondary cells. In an example, the basestation may transmit a MA CE indicating activation or deactivation ofone or more secondary cells. In an example, the base station maytransmit one or more MAC CEs indicating starting and/or stopping one ormore Discontinuous Reception (DRX) timers at the wireless device. In anexample, the base station may transmit one or more MAC CEs indicatingone or more timing advance values for one or more Timing Advance Groups(TAGs).

FIG. 3 is a block diagram of base stations (base station 1, 120A, andbase station 2, 120B) and a wireless device 110. A wireless device maybe called an UE. A base station may be called a NB, eNB, gNB, and/orng-eNB. In an example, a wireless device and/or a base station may actas a relay node. The base station 1, 120A, may comprise at least onecommunication interface 320A (e.g. a wireless modem, an antenna, a wiredmodem, and/or the like), at least one processor 321A, and at least oneset of program code instructions 323A stored in non-transitory memory322A and executable by the at least one processor 321A. The base station2, 120B, may comprise at least one communication interface 320B, atleast one processor 321B, and at least one set of program codeinstructions 323B stored in non-transitory memory 322B and executable bythe at least one processor 321B.

A base station may comprise many sectors for example: 1, 2, 3, 4, or 6sectors. A base station may comprise many cells, for example, rangingfrom 1 to 50 cells or more. A cell may be categorized, for example, as aprimary cell or secondary cell. At Radio Resource Control (RRC)connection establishment/re-establishment/handover, one serving cell mayprovide the NAS (non-access stratum) mobility information (e.g. TrackingArea Identifier (TAI)). At RRC connection re-establishment/handover, oneserving cell may provide the security input. This cell may be referredto as the Primary Cell (PCell). In the downlink, a carrier correspondingto the PCell may be a DL Primary Component Carrier (PCC), while in theuplink, a carrier may be an UL PCC. Depending on wireless devicecapabilities, Secondary Cells (SCells) may be configured to formtogether with a PCell a set of serving cells. In a downlink, a carriercorresponding to an SCell may be a downlink secondary component carrier(DL SCC), while in an uplink, a carrier may be an uplink secondarycomponent carrier (UL SCC). An SCell may or may not have an uplinkcarrier.

A cell, comprising a downlink carrier and optionally an uplink carrier,may be assigned a physical cell ID and a cell index. A carrier (downlinkor uplink) may belong to one cell. The cell ID or cell index may alsoidentify the downlink carrier or uplink carrier of the cell (dependingon the context it is used). In the disclosure, a cell ID may be equallyreferred to a carrier ID, and a cell index may be referred to a carrierindex. In an implementation, a physical cell ID or a cell index may beassigned to a cell. A cell ID may be determined using a synchronizationsignal transmitted on a downlink carrier. A cell index may be determinedusing RRC messages. For example, when the disclosure refers to a firstphysical cell ID for a first downlink carrier, the disclosure may meanthe first physical cell ID is for a cell comprising the first downlinkcarrier. The same concept may apply to, for example, carrier activation.When the disclosure indicates that a first carrier is activated, thespecification may equally mean that a cell comprising the first carrieris activated.

A base station may transmit to a wireless device one or more messages(e.g. RRC messages) comprising a plurality of configuration parametersfor one or more cells. One or more cells may comprise at least oneprimary cell and at least one secondary cell. In an example, an RRCmessage may be broadcasted or unicasted to the wireless device. In anexample, configuration parameters may comprise common parameters anddedicated parameters.

Services and/or functions of an RRC sublayer may comprise at least oneof: broadcast of system information related to AS and NAS; paginginitiated by 5GC and/or NG-RAN; establishment, maintenance, and/orrelease of an RRC connection between a wireless device and NG-RAN, whichmay comprise at least one of addition, modification and release ofcarrier aggregation; or addition, modification, and/or release of dualconnectivity in NR or between E-UTRA and NR. Services and/or functionsof an RRC sublayer may further comprise at least one of securityfunctions comprising key management; establishment, configuration,maintenance, and/or release of Signaling Radio Bearers (SRBs) and/orData Radio Bearers (DRBs); mobility functions which may comprise atleast one of a handover (e.g. intra NR mobility or inter-RAT mobility)and a context transfer; or a wireless device cell selection andreselection and control of cell selection and reselection. Servicesand/or functions of an RRC sublayer may further comprise at least one ofQoS management functions; a wireless device measurementconfiguration/reporting; detection of and/or recovery from radio linkfailure; or NAS message transfer to/from a core network entity (e.g.AMF, Mobility Management Entity (MME)) from/to the wireless device.

An RRC sublayer may support an RRC_Idle state, an RRC_Inactive stateand/or an RRC_Connected state for a wireless device. In an RRC_Idlestate, a wireless device may perform at least one of: Public Land MobileNetwork (PLMN) selection; receiving broadcasted system information; cellselection/re-selection; monitoring/receiving a paging for mobileterminated data initiated by 5GC; paging for mobile terminated data areamanaged by 5GC; or DRX for CN paging configured via NAS. In anRRC_Inactive state, a wireless device may perform at least one of:receiving broadcasted system information; cell selection/re-selection;monitoring/receiving a RAN/CN paging initiated by NG-RAN/5GC; RAN-basednotification area (RNA) managed by NG-RAN; or DRX for RAN/CN pagingconfigured by NG-RAN/NAS. In an RRC_Idle state of a wireless device, abase station (e.g. NG-RAN) may keep a 5GC-NG-RAN connection (bothC/U-planes) for the wireless device; and/or store a UE AS context forthe wireless device. In an RRC_Connected state of a wireless device, abase station (e.g. NG-RAN) may perform at least one of: establishment of5GC-NG-RAN connection (both C/U-planes) for the wireless device; storinga UE AS context for the wireless device; transmit/receive of unicastdata to/from the wireless device; or network-controlled mobility basedon measurement results received from the wireless device. In anRRC_Connected state of a wireless device, an NG-RAN may know a cell thatthe wireless device belongs to.

System information (SI) may be divided into minimum SI and other SI. Theminimum SI may be periodically broadcast. The minimum SI may comprisebasic information required for initial access and information foracquiring any other SI broadcast periodically or provisioned on-demand,i.e. scheduling information. The other SI may either be broadcast, or beprovisioned in a dedicated manner, either triggered by a network or uponrequest from a wireless device. A minimum SI may be transmitted via twodifferent downlink channels using different messages (e.g.MasterInformationBlock and SystemInformationBlockType1). Another SI maybe transmitted via SystemInformationBlockType2. For a wireless device inan RRC_Connected state, dedicated RRC signaling may be employed for therequest and delivery of the other SI. For the wireless device in theRRC_Idle state and/or the RRC_Inactive state, the request may trigger arandom-access procedure.

A wireless device may report its radio access capability informationwhich may be static. A base station may request what capabilities for awireless device to report based on band information. When allowed by anetwork, a temporary capability restriction request may be sent by thewireless device to signal the limited availability of some capabilities(e.g. due to hardware sharing, interference or overheating) to the basestation. The base station may confirm or reject the request. Thetemporary capability restriction may be transparent to 5GC (e.g., staticcapabilities may be stored in 5GC).

When CA is configured, a wireless device may have an RRC connection witha network. At RRC connection establishment/re-establishment/handoverprocedure, one serving cell may provide NAS mobility information, and atRRC connection re-establishment/handover, one serving cell may provide asecurity input. This cell may be referred to as the PCell. Depending onthe capabilities of the wireless device, SCells may be configured toform together with the PCell a set of serving cells. The configured setof serving cells for the wireless device may comprise one PCell and oneor more SCells.

The reconfiguration, addition and removal of SCells may be performed byRRC. At intra-NR handover, RRC may also add, remove, or reconfigureSCells for usage with the target PCell. When adding a new SCell,dedicated RRC signaling may be employed to send all required systeminformation of the SCell i.e. while in connected mode, wireless devicesmay not need to acquire broadcasted system information directly from theSCells.

The purpose of an RRC connection reconfiguration procedure may be tomodify an RRC connection, (e.g. to establish, modify and/or release RBs,to perform handover, to setup, modify, and/or release measurements, toadd, modify, and/or release SCells and cell groups). As part of the RRCconnection reconfiguration procedure, NAS dedicated information may betransferred from the network to the wireless device. TheRRCConnectionReconfiguration message may be a command to modify an RRCconnection. It may convey information for measurement configuration,mobility control, radio resource configuration (e.g. RBs, MAC mainconfiguration and physical channel configuration) comprising anyassociated dedicated NAS information and security configuration. If thereceived RRC Connection Reconfiguration message includes thesCellToReleaseList, the wireless device may perform an SCell release. Ifthe received RRC Connection Reconfiguration message includes thesCellToAddModList, the wireless device may perform SCell additions ormodification.

An RRC connection establishment (or reestablishment, resume) proceduremay be to establish (or reestablish, resume) an RRC connection. an RRCconnection establishment procedure may comprise SRB1 establishment. TheRRC connection establishment procedure may be used to transfer theinitial NAS dedicated information/message from a wireless device toE-UTRAN. The RRCConnectionReestablishment message may be used tore-establish SRB1.

A measurement report procedure may be to transfer measurement resultsfrom a wireless device to NG-RAN. The wireless device may initiate ameasurement report procedure after successful security activation. Ameasurement report message may be employed to transmit measurementresults.

The wireless device 110 may comprise at least one communicationinterface 310 (e.g. a wireless modem, an antenna, and/or the like), atleast one processor 314, and at least one set of program codeinstructions 316 stored in non-transitory memory 315 and executable bythe at least one processor 314. The wireless device 110 may furthercomprise at least one of at least one speaker/microphone 311, at leastone keypad 312, at least one display/touchpad 313, at least one powersource 317, at least one global positioning system (GPS) chipset 318,and other peripherals 319.

The processor 314 of the wireless device 110, the processor 321A of thebase station 1 120A, and/or the processor 321B of the base station 2120B may comprise at least one of a general-purpose processor, a digitalsignal processor (DSP), a controller, a microcontroller, an applicationspecific integrated circuit (ASIC), a field programmable gate array(FPGA) and/or other programmable logic device, discrete gate and/ortransistor logic, discrete hardware components, and the like. Theprocessor 314 of the wireless device 110, the processor 321A in basestation 1 120A, and/or the processor 321B in base station 2 120B mayperform at least one of signal coding/processing, data processing, powercontrol, input/output processing, and/or any other functionality thatmay enable the wireless device 110, the base station 1 120A and/or thebase station 2 120B to operate in a wireless environment.

The processor 314 of the wireless device 110 may be connected to thespeaker/microphone 311, the keypad 312, and/or the display/touchpad 313.The processor 314 may receive user input data from and/or provide useroutput data to the speaker/microphone 311, the keypad 312, and/or thedisplay/touchpad 313. The processor 314 in the wireless device 110 mayreceive power from the power source 317 and/or may be configured todistribute the power to the other components in the wireless device 110.The power source 317 may comprise at least one of one or more dry cellbatteries, solar cells, fuel cells, and the like. The processor 314 maybe connected to the GPS chipset 318. The GPS chipset 318 may beconfigured to provide geographic location information of the wirelessdevice 110.

The processor 314 of the wireless device 110 may further be connected toother peripherals 319, which may comprise one or more software and/orhardware modules that provide additional features and/orfunctionalities. For example, the peripherals 319 may comprise at leastone of an accelerometer, a satellite transceiver, a digital camera, auniversal serial bus (USB) port, a hands-free headset, a frequencymodulated (FM) radio unit, a media player, an Internet browser, and thelike.

The communication interface 320A of the base station 1, 120A, and/or thecommunication interface 320B of the base station 2, 120B, may beconfigured to communicate with the communication interface 310 of thewireless device 110 via a wireless link 330A and/or a wireless link 330Brespectively. In an example, the communication interface 320A of thebase station 1, 120A, may communicate with the communication interface320B of the base station 2 and other RAN and core network nodes.

The wireless link 330A and/or the wireless link 330B may comprise atleast one of a bi-directional link and/or a directional link. Thecommunication interface 310 of the wireless device 110 may be configuredto communicate with the communication interface 320A of the base station1 120A and/or with the communication interface 320B of the base station2 120B. The base station 1 120A and the wireless device 110 and/or thebase station 2 120B and the wireless device 110 may be configured tosend and receive transport blocks via the wireless link 330A and/or viathe wireless link 330B, respectively. The wireless link 330A and/or thewireless link 330B may employ at least one frequency carrier. Accordingto some of various aspects of embodiments, transceiver(s) may beemployed. A transceiver may be a device that comprises both atransmitter and a receiver. Transceivers may be employed in devices suchas wireless devices, base stations, relay nodes, and/or the like.Example embodiments for radio technology implemented in thecommunication interface 310, 320A, 320B and the wireless link 330A, 330Bare illustrated in FIG. 4A, FIG. 4B, FIG. 4C, FIG. 4D, FIG. 6, FIG. 7A,FIG. 7B, FIG. 8, and associated text.

In an example, other nodes in a wireless network (e.g. AMF, UPF, SMF,etc.) may comprise one or more communication interfaces, one or moreprocessors, and memory storing instructions.

A node (e.g. wireless device, base station, AMF, SMF, UPF, servers,switches, antennas, and/or the like) may comprise one or moreprocessors, and memory storing instructions that when executed by theone or more processors causes the node to perform certain processesand/or functions. Example embodiments may enable operation ofsingle-carrier and/or multi-carrier communications. Other exampleembodiments may comprise a non-transitory tangible computer readablemedia comprising instructions executable by one or more processors tocause operation of single-carrier and/or multi-carrier communications.Yet other example embodiments may comprise an article of manufacturethat comprises a non-transitory tangible computer readablemachine-accessible medium having instructions encoded thereon forenabling programmable hardware to cause a node to enable operation ofsingle-carrier and/or multi-carrier communications. The node may includeprocessors, memory, interfaces, and/or the like.

An interface may comprise at least one of a hardware interface, afirmware interface, a software interface, and/or a combination thereof.The hardware interface may comprise connectors, wires, electronicdevices such as drivers, amplifiers, and/or the like. The softwareinterface may comprise code stored in a memory device to implementprotocol(s), protocol layers, communication drivers, device drivers,combinations thereof, and/or the like. The firmware interface maycomprise a combination of embedded hardware and code stored in and/or incommunication with a memory device to implement connections, electronicdevice operations, protocol(s), protocol layers, communication drivers,device drivers, hardware operations, combinations thereof, and/or thelike.

FIG. 4A, FIG. 4B, FIG. 4C and FIG. 4D are example diagrams for uplinkand downlink signal transmission as per an aspect of an embodiment ofthe present disclosure. FIG. 4A shows an example uplink transmitter forat least one physical channel. A baseband signal representing a physicaluplink shared channel may perform one or more functions. The one or morefunctions may comprise at least one of: scrambling; modulation ofscrambled bits to generate complex-valued symbols; mapping of thecomplex-valued modulation symbols onto one or several transmissionlayers; transform precoding to generate complex-valued symbols;precoding of the complex-valued symbols; mapping of precodedcomplex-valued symbols to resource elements; generation ofcomplex-valued time-domain Single Carrier-Frequency Division MultipleAccess (SC-FDMA) or CP-OFDM signal for an antenna port; and/or the like.In an example, when transform precoding is enabled, a SC-FDMA signal foruplink transmission may be generated. In an example, when transformprecoding is not enabled, an CP-OFDM signal for uplink transmission maybe generated by FIG. 4A. These functions are illustrated as examples andit is anticipated that other mechanisms may be implemented in variousembodiments.

An example structure for modulation and up-conversion to the carrierfrequency of the complex-valued SC-FDMA or CP-OFDM baseband signal foran antenna port and/or the complex-valued Physical Random Access CHannel(PRACH) baseband signal is shown in FIG. 4B. Filtering may be employedprior to transmission.

An example structure for downlink transmissions is shown in FIG. 4C. Thebaseband signal representing a downlink physical channel may perform oneor more functions. The one or more functions may comprise: scrambling ofcoded bits in a codeword to be transmitted on a physical channel;modulation of scrambled bits to generate complex-valued modulationsymbols; mapping of the complex-valued modulation symbols onto one orseveral transmission layers; precoding of the complex-valued modulationsymbols on a layer for transmission on the antenna ports; mapping ofcomplex-valued modulation symbols for an antenna port to resourceelements; generation of complex-valued time-domain OFDM signal for anantenna port; and/or the like. These functions are illustrated asexamples and it is anticipated that other mechanisms may be implementedin various embodiments.

In an example, a gNB may transmit a first symbol and a second symbol onan antenna port, to a wireless device. The wireless device may infer thechannel (e.g., fading gain, multipath delay, etc.) for conveying thesecond symbol on the antenna port, from the channel for conveying thefirst symbol on the antenna port. In an example, a first antenna portand a second antenna port may be quasi co-located if one or morelarge-scale properties of the channel over which a first symbol on thefirst antenna port is conveyed may be inferred from the channel overwhich a second symbol on a second antenna port is conveyed. The one ormore large-scale properties may comprise at least one of: delay spread;doppler spread; doppler shift; average gain; average delay; and/orspatial Receiving (Rx) parameters.

An example modulation and up-conversion to the carrier frequency of thecomplex-valued OFDM baseband signal for an antenna port is shown in FIG.4D. Filtering may be employed prior to transmission.

FIG. 5A is a diagram of an example uplink channel mapping and exampleuplink physical signals. FIG. 5B is a diagram of an example downlinkchannel mapping and a downlink physical signals. In an example, aphysical layer may provide one or more information transfer services toa MAC and/or one or more higher layers. For example, the physical layermay provide the one or more information transfer services to the MAC viaone or more transport channels. An information transfer service mayindicate how and with what characteristics data are transferred over theradio interface.

In an example embodiment, a radio network may comprise one or moredownlink and/or uplink transport channels. For example, a diagram inFIG. 5A shows example uplink transport channels comprising Uplink-SharedCHannel (UL-SCH) 501 and Random Access CHannel (RACH) 502. A diagram inFIG. 5B shows example downlink transport channels comprisingDownlink-Shared CHannel (DL-SCH) 511, Paging CHannel (PCH) 512, andBroadcast CHannel (BCH) 513. A transport channel may be mapped to one ormore corresponding physical channels. For example, UL-SCH 501 may bemapped to Physical Uplink Shared CHannel (PUSCH) 503. RACH 502 may bemapped to PRACH 505. DL-SCH 511 and PCH 512 may be mapped to PhysicalDownlink Shared CHannel (PDSCH) 514. BCH 513 may be mapped to PhysicalBroadcast CHannel (PBCH) 516.

There may be one or more physical channels without a correspondingtransport channel. The one or more physical channels may be employed forUplink Control Information (UCI) 509 and/or Downlink Control Information(DCI) 517. For example, Physical Uplink Control CHannel (PUCCH) 504 maycarry UCI 509 from a UE to a base station. For example, PhysicalDownlink Control CHannel (PDCCH) 515 may carry DCI 517 from a basestation to a UE. NR may support UCI 509 multiplexing in PUSCH 503 whenUCI 509 and PUSCH 503 transmissions may coincide in a slot at least inpart. The UCI 509 may comprise at least one of CSI, Acknowledgement(ACK)/Negative Acknowledgement (NACK), and/or scheduling request. TheDCI 517 on PDCCH 515 may indicate at least one of following: one or moredownlink assignments and/or one or more uplink scheduling grants

In uplink, a UE may transmit one or more Reference Signals (RSs) to abase station. For example, the one or more RSs may be at least one ofDemodulation-RS (DM-RS) 506, Phase Tracking-RS (PT-RS) 507, and/orSounding RS (SRS) 508. In downlink, a base station may transmit (e.g.,unicast, multicast, and/or broadcast) one or more RSs to a UE. Forexample, the one or more RSs may be at least one of PrimarySynchronization Signal (PSS)/Secondary Synchronization Signal (SSS) 521,CSI-RS 522, DM-RS 523, and/or PT-RS 524.

In an example, a UE may transmit one or more uplink DM-RSs 506 to a basestation for channel estimation, for example, for coherent demodulationof one or more uplink physical channels (e.g., PUSCH 503 and/or PUCCH504). For example, a UE may transmit a base station at least one uplinkDM-RS 506 with PUSCH 503 and/or PUCCH 504, wherein the at least oneuplink DM-RS 506 may be spanning a same frequency range as acorresponding physical channel. In an example, a base station mayconfigure a UE with one or more uplink DM-RS configurations. At leastone DM-RS configuration may support a front-loaded DM-RS pattern. Afront-loaded DM-RS may be mapped over one or more OFDM symbols (e.g., 1or 2 adjacent OFDM symbols). One or more additional uplink DM-RS may beconfigured to transmit at one or more symbols of a PUSCH and/or PUCCH. Abase station may semi-statistically configure a UE with a maximum numberof front-loaded DM-RS symbols for PUSCH and/or PUCCH. For example, a UEmay schedule a single-symbol DM-RS and/or double symbol DM-RS based on amaximum number of front-loaded DM-RS symbols, wherein a base station mayconfigure the UE with one or more additional uplink DM-RS for PUSCHand/or PUCCH. A new radio network may support, e.g., at least forCP-OFDM, a common DM-RS structure for DL and UL, wherein a DM-RSlocation, DM-RS pattern, and/or scrambling sequence may be same ordifferent.

In an example, whether uplink PT-RS 507 is present or not may depend ona RRC configuration. For example, a presence of uplink PT-RS may beUE-specifically configured. For example, a presence and/or a pattern ofuplink PT-RS 507 in a scheduled resource may be UE-specificallyconfigured by a combination of RRC signaling and/or association with oneor more parameters employed for other purposes (e.g., Modulation andCoding Scheme (MCS)) which may be indicated by DCI. When configured, adynamic presence of uplink PT-RS 507 may be associated with one or moreDCI parameters comprising at least MCS. A radio network may supportplurality of uplink PT-RS densities defined in time/frequency domain.When present, a frequency domain density may be associated with at leastone configuration of a scheduled bandwidth. A UE may assume a sameprecoding for a DMRS port and a PT-RS port. A number of PT-RS ports maybe fewer than a number of DM-RS ports in a scheduled resource. Forexample, uplink PT-RS 507 may be confined in the scheduledtime/frequency duration for a UE.

In an example, a UE may transmit SRS 508 to a base station for channelstate estimation to support uplink channel dependent scheduling and/orlink adaptation. For example, SRS 508 transmitted by a UE may allow fora base station to estimate an uplink channel state at one or moredifferent frequencies. A base station scheduler may employ an uplinkchannel state to assign one or more resource blocks of good quality foran uplink PUSCH transmission from a UE. A base station maysemi-statistically configure a UE with one or more SRS resource sets.For an SRS resource set, a base station may configure a UE with one ormore SRS resources. An SRS resource set applicability may be configuredby a higher layer (e.g., RRC) parameter. For example, when a higherlayer parameter indicates beam management, a SRS resource in each of oneor more SRS resource sets may be transmitted at a time instant. A UE maytransmit one or more SRS resources in different SRS resource setssimultaneously. A new radio network may support aperiodic, periodicand/or semi-persistent SRS transmissions. A UE may transmit SRSresources based on one or more trigger types, wherein the one or moretrigger types may comprise higher layer signaling (e.g., RRC) and/or oneor more DCI formats (e.g., at least one DCI format may be employed for aUE to select at least one of one or more configured SRS resource sets.An SRS trigger type 0 may refer to an SRS triggered based on a higherlayer signaling. An SRS trigger type 1 may refer to an SRS triggeredbased on one or more DCI formats. In an example, when PUSCH 503 and SRS508 are transmitted in a same slot, a UE may be configured to transmitSRS 508 after a transmission of PUSCH 503 and corresponding uplink DM-RS506.

In an example, a base station may semi-statistically configure a UE withone or more SRS configuration parameters indicating at least one offollowing: a SRS resource configuration identifier, a number of SRSports, time domain behavior of SRS resource configuration (e.g., anindication of periodic, semi-persistent, or aperiodic SRS), slot(mini-slot, and/or subframe) level periodicity and/or offset for aperiodic and/or aperiodic SRS resource, a number of OFDM symbols in aSRS resource, starting OFDM symbol of a SRS resource, a SRS bandwidth, afrequency hopping bandwidth, a cyclic shift, and/or a SRS sequence ID.

In an example, in a time domain, an SS/PBCH block may comprise one ormore OFDM symbols (e.g., 4 OFDM symbols numbered in increasing orderfrom 0 to 3) within the SS/PBCH block. An SS/PBCH block may comprisePSS/SSS 521 and PBCH 516. In an example, in the frequency domain, anSS/PBCH block may comprise one or more contiguous subcarriers (e.g., 240contiguous subcarriers with the subcarriers numbered in increasing orderfrom 0 to 239) within the SS/PBCH block. For example, a PSS/SSS 521 mayoccupy 1 OFDM symbol and 127 subcarriers. For example, PBCH 516 may spanacross 3 OFDM symbols and 240 subcarriers. A UE may assume that one ormore SS/PBCH blocks transmitted with a same block index may be quasico-located, e.g., with respect to Doppler spread, Doppler shift, averagegain, average delay, and spatial Rx parameters. A UE may not assumequasi co-location for other SS/PBCH block transmissions. A periodicityof an SS/PBCH block may be configured by a radio network (e.g., by anRRC signaling) and one or more time locations where the SS/PBCH blockmay be sent may be determined by sub-carrier spacing. In an example, aUE may assume a band-specific sub-carrier spacing for an SS/PBCH blockunless a radio network has configured a UE to assume a differentsub-carrier spacing.

In an example, downlink CSI-RS 522 may be employed for a UE to acquirechannel state information. A radio network may support periodic,aperiodic, and/or semi-persistent transmission of downlink CSI-RS 522.For example, a base station may semi-statistically configure and/orreconfigure a UE with periodic transmission of downlink CSI-RS 522. Aconfigured CSI-RS resources may be activated ad/or deactivated. Forsemi-persistent transmission, an activation and/or deactivation ofCSI-RS resource may be triggered dynamically. In an example, CSI-RSconfiguration may comprise one or more parameters indicating at least anumber of antenna ports. For example, a base station may configure a UEwith 32 ports. A base station may semi-statistically configure a UE withone or more CSI-RS resource sets. One or more CSI-RS resources may beallocated from one or more CSI-RS resource sets to one or more UEs. Forexample, a base station may semi-statistically configure one or moreparameters indicating CSI RS resource mapping, for example, time-domainlocation of one or more CSI-RS resources, a bandwidth of a CSI-RSresource, and/or a periodicity. In an example, a UE may be configured toemploy a same OFDM symbols for downlink CSI-RS 522 and control resourceset (coreset) when the downlink CSI-RS 522 and coreset are spatiallyquasi co-located and resource elements associated with the downlinkCSI-RS 522 are the outside of PRB s configured for coreset. In anexample, a UE may be configured to employ a same OFDM symbols fordownlink CSI-RS 522 and SS/PBCH blocks when the downlink CSI-RS 522 andSS/PBCH blocks are spatially quasi co-located and resource elementsassociated with the downlink CSI-RS 522 are the outside of PRBsconfigured for SS/PBCH blocks.

In an example, a UE may transmit one or more downlink DM-RSs 523 to abase station for channel estimation, for example, for coherentdemodulation of one or more downlink physical channels (e.g., PDSCH514). For example, a radio network may support one or more variableand/or configurable DM-RS patterns for data demodulation. At least onedownlink DM-RS configuration may support a front-loaded DM-RS pattern. Afront-loaded DM-RS may be mapped over one or more OFDM symbols (e.g., 1or 2 adjacent OFDM symbols). A base station may semi-statisticallyconfigure a UE with a maximum number of front-loaded DM-RS symbols forPDSCH 514. For example, a DM-RS configuration may support one or moreDM-RS ports. For example, for single user-MIMO, a DM-RS configurationmay support at least 8 orthogonal downlink DM-RS ports. For example, formultiuser-MIMO, a DM-RS configuration may support 12 orthogonal downlinkDM-RS ports. A radio network may support, e.g., at least for CP-OFDM, acommon DM-RS structure for DL and UL, wherein a DM-RS location, DM-RSpattern, and/or scrambling sequence may be same or different.

In an example, whether downlink PT-RS 524 is present or not may dependon a RRC configuration. For example, a presence of downlink PT-RS 524may be UE-specifically configured. For example, a presence and/or apattern of downlink PT-RS 524 in a scheduled resource may beUE-specifically configured by a combination of RRC signaling and/orassociation with one or more parameters employed for other purposes(e.g., MCS) which may be indicated by DCI. When configured, a dynamicpresence of downlink PT-RS 524 may be associated with one or more DCIparameters comprising at least MCS. A radio network may supportplurality of PT-RS densities defined in time/frequency domain. Whenpresent, a frequency domain density may be associated with at least oneconfiguration of a scheduled bandwidth. A UE may assume a same precodingfor a DMRS port and a PT-RS port. A number of PT-RS ports may be fewerthan a number of DM-RS ports in a scheduled resource. For example,downlink PT-RS 524 may be confined in the scheduled time/frequencyduration for a UE.

FIG. 6 is a diagram depicting an example transmission time and receptiontime for a carrier as per an aspect of an embodiment of the presentdisclosure. A multicarrier OFDM communication system may include one ormore carriers, for example, ranging from 1 to 32 carriers, in case ofcarrier aggregation, or ranging from 1 to 64 carriers, in case of dualconnectivity. Different radio frame structures may be supported (e.g.,for FDD and for TDD duplex mechanisms). FIG. 6 shows an example frametiming. Downlink and uplink transmissions may be organized into radioframes 601. In this example, radio frame duration is 10 ms. In thisexample, a 10 ms radio frame 601 may be divided into ten equally sizedsubframes 602 with 1 ms duration. Subframe(s) may comprise one or moreslots (e.g. slots 603 and 605) depending on subcarrier spacing and/or CPlength. For example, a subframe with 15 kHz, 30 kHz, 60 kHz, 120 kHz,240 kHz and 480 kHz subcarrier spacing may comprise one, two, four,eight, sixteen and thirty-two slots, respectively. In FIG. 6, a subframemay be divided into two equally sized slots 603 with 0.5 ms duration.For example, 10 subframes may be available for downlink transmission and10 subframes may be available for uplink transmissions in a 10 msinterval. Uplink and downlink transmissions may be separated in thefrequency domain. Slot(s) may include a plurality of OFDM symbols 604.The number of OFDM symbols 604 in a slot 605 may depend on the cyclicprefix length. For example, a slot may be 14 OFDM symbols for the samesubcarrier spacing of up to 480 kHz with normal CP. A slot may be 12OFDM symbols for the same subcarrier spacing of 60 kHz with extended CP.A slot may contain downlink, uplink, or a downlink part and an uplinkpart and/or alike.

FIG. 7A is a diagram depicting example sets of OFDM subcarriers as peran aspect of an embodiment of the present disclosure. In the example, agNB may communicate with a wireless device with a carrier with anexample channel bandwidth 700. Arrow(s) in the diagram may depict asubcarrier in a multicarrier OFDM system. The OFDM system may usetechnology such as OFDM technology, SC-FDMA technology, and/or the like.In an example, an arrow 701 shows a subcarrier transmitting informationsymbols. In an example, a subcarrier spacing 702, between two contiguoussubcarriers in a carrier, may be any one of 15 KHz, 30 KHz, 60 KHz, 120KHz, 240 KHz etc. In an example, different subcarrier spacing maycorrespond to different transmission numerologies. In an example, atransmission numerology may comprise at least: a numerology index; avalue of subcarrier spacing; a type of cyclic prefix (CP). In anexample, a gNB may transmit to/receive from a UE on a number ofsubcarriers 703 in a carrier. In an example, a bandwidth occupied by anumber of subcarriers 703 (transmission bandwidth) may be smaller thanthe channel bandwidth 700 of a carrier, due to guard band 704 and 705.In an example, a guard band 704 and 705 may be used to reduceinterference to and from one or more neighbor carriers. A number ofsubcarriers (transmission bandwidth) in a carrier may depend on thechannel bandwidth of the carrier and the subcarrier spacing. Forexample, a transmission bandwidth, for a carrier with 20 MHz channelbandwidth and 15 KHz subcarrier spacing, may be in number of 1024subcarriers.

In an example, a gNB and a wireless device may communicate with multipleCCs when configured with CA. In an example, different component carriersmay have different bandwidth and/or subcarrier spacing, if CA issupported. In an example, a gNB may transmit a first type of service toa UE on a first component carrier. The gNB may transmit a second type ofservice to the UE on a second component carrier. Different type ofservices may have different service requirement (e.g., data rate,latency, reliability), which may be suitable for transmission viadifferent component carrier having different subcarrier spacing and/orbandwidth. FIG. 7B shows an example embodiment. A first componentcarrier may comprise a first number of subcarriers 706 with a firstsubcarrier spacing 709. A second component carrier may comprise a secondnumber of subcarriers 707 with a second subcarrier spacing 710. A thirdcomponent carrier may comprise a third number of subcarriers 708 with athird subcarrier spacing 711. Carriers in a multicarrier OFDMcommunication system may be contiguous carriers, non-contiguouscarriers, or a combination of both contiguous and non-contiguouscarriers.

FIG. 8 is a diagram depicting OFDM radio resources as per an aspect ofan embodiment of the present disclosure. In an example, a carrier mayhave a transmission bandwidth 801. In an example, a resource grid may bein a structure of frequency domain 802 and time domain 803. In anexample, a resource grid may comprise a first number of OFDM symbols ina subframe and a second number of resource blocks, starting from acommon resource block indicated by higher-layer signaling (e.g. RRCsignaling), for a transmission numerology and a carrier. In an example,in a resource grid, a resource unit identified by a subcarrier index anda symbol index may be a resource element 805. In an example, a subframemay comprise a first number of OFDM symbols 807 depending on anumerology associated with a carrier. For example, when a subcarrierspacing of a numerology of a carrier is 15 KHz, a subframe may have 14OFDM symbols for a carrier. When a subcarrier spacing of a numerology is30 KHz, a subframe may have 28 OFDM symbols. When a subcarrier spacingof a numerology is 60 Khz, a subframe may have 56 OFDM symbols, etc. Inan example, a second number of resource blocks comprised in a resourcegrid of a carrier may depend on a bandwidth and a numerology of thecarrier.

As shown in FIG. 8, a resource block 806 may comprise 12 subcarriers. Inan example, multiple resource blocks may be grouped into a ResourceBlock Group (RBG) 804. In an example, a size of a RBG may depend on atleast one of: a RRC message indicating a RBG size configuration; a sizeof a carrier bandwidth; or a size of a bandwidth part of a carrier. Inan example, a carrier may comprise multiple bandwidth parts. A firstbandwidth part of a carrier may have different frequency location and/orbandwidth from a second bandwidth part of the carrier.

In an example, a gNB may transmit a downlink control informationcomprising a downlink or uplink resource block assignment to a wirelessdevice. A base station may transmit to or receive from, a wirelessdevice, data packets (e.g. transport blocks) scheduled and transmittedvia one or more resource blocks and one or more slots according toparameters in a downlink control information and/or RRC message(s). Inan example, a starting symbol relative to a first slot of the one ormore slots may be indicated to the wireless device. In an example, a gNBmay transmit to or receive from, a wireless device, data packetsscheduled on one or more RBGs and one or more slots.

In an example, a gNB may transmit a downlink control informationcomprising a downlink assignment to a wireless device via one or morePDCCHs. The downlink assignment may comprise parameters indicating atleast modulation and coding format; resource allocation; and/or HARQinformation related to DL-SCH. In an example, a resource allocation maycomprise parameters of resource block allocation; and/or slotallocation. In an example, a gNB may dynamically allocate resources to awireless device via a Cell-Radio Network Temporary Identifier (C-RNTI)on one or more PDCCHs. The wireless device may monitor the one or morePDCCHs in order to find possible allocation when its downlink receptionis enabled. The wireless device may receive one or more downlink datapackage on one or more PDSCH scheduled by the one or more PDCCHs, whensuccessfully detecting the one or more PDCCHs.

In an example, a gNB may allocate Configured Scheduling (CS) resourcesfor down link transmission to a wireless device. The gNB may transmitone or more RRC messages indicating a periodicity of the CS grant. ThegNB may transmit a DCI via a PDCCH addressed to a ConfiguredScheduling-RNTI (CS-RNTI) activating the CS resources. The DCI maycomprise parameters indicating that the downlink grant is a CS grant.The CS grant may be implicitly reused according to the periodicitydefined by the one or more RRC messages, until deactivated.

In an example, a gNB may transmit a downlink control informationcomprising an uplink grant to a wireless device via one or more PDCCHs.The uplink grant may comprise parameters indicating at least modulationand coding format; resource allocation; and/or HARQ information relatedto UL-SCH. In an example, a resource allocation may comprise parametersof resource block allocation; and/or slot allocation. In an example, agNB may dynamically allocate resources to a wireless device via a C-RNTIon one or more PDCCHs. The wireless device may monitor the one or morePDCCHs in order to find possible resource allocation. The wirelessdevice may transmit one or more uplink data package via one or morePUSCH scheduled by the one or more PDCCHs, when successfully detectingthe one or more PDCCHs.

In an example, a gNB may allocate CS resources for uplink datatransmission to a wireless device. The gNB may transmit one or more RRCmessages indicating a periodicity of the CS grant. The gNB may transmita DCI via a PDCCH addressed to a CS-RNTI activating the CS resources.The DCI may comprise parameters indicating that the uplink grant is a CSgrant. The CS grant may be implicitly reused according to theperiodicity defined by the one or more RRC message, until deactivated.

In an example, a base station may transmit DCI/control signaling viaPDCCH. The DCI may take a format in a plurality of formats. A DCI maycomprise downlink and/or uplink scheduling information (e.g., resourceallocation information, HARQ related parameters, MCS), request for CSI(e.g., aperiodic CQI reports), request for SRS, uplink power controlcommands for one or more cells, one or more timing information (e.g., TBtransmission/reception timing, HARQ feedback timing, etc.), etc. In anexample, a DCI may indicate an uplink grant comprising transmissionparameters for one or more transport blocks. In an example, a DCI mayindicate downlink assignment indicating parameters for receiving one ormore transport blocks. In an example, a DCI may be used by base stationto initiate a contention-free random access at the wireless device. Inan example, the base station may transmit a DCI comprising slot formatindicator (SFI) notifying a slot format. In an example, the base stationmay transmit a DCI comprising pre-emption indication notifying thePRB(s) and/or OFDM symbol(s) where a UE may assume no transmission isintended for the UE. In an example, the base station may transmit a DCIfor group power control of PUCCH or PUSCH or SRS. In an example, a DCImay correspond to an RNTI. In an example, the wireless device may obtainan RNTI in response to completing the initial access (e.g., C-RNTI). Inan example, the base station may configure an RNTI for the wireless(e.g., CS-RNTI, TPC-CS-RNTI, TPC-PUCCH-RNTI, TPC-PUSCH-RNTI,TPC-SRS-RNTI). In an example, the wireless device may compute an RNTI(e.g., the wireless device may compute RA-RNTI based on resources usedfor transmission of a preamble). In an example, an RNTI may have apre-configured value (e.g., P-RNTI or SI-RNTI). In an example, awireless device may monitor a group common search space which may beused by base station for transmitting DCIs that are intended for a groupof UEs. In an example, a group common DCI may correspond to an RNTIwhich is commonly configured for a group of UEs. In an example, awireless device may monitor a UE-specific search space. In an example, aUE specific DCI may correspond to an RNTI configured for the wirelessdevice.

A NR system may support a single beam operation and/or a multi-beamoperation. In a multi-beam operation, a base station may perform adownlink beam sweeping to provide coverage for common control channelsand/or downlink SS blocks, which may comprise at least a PSS, a SSS,and/or PBCH. A wireless device may measure quality of a beam pair linkusing one or more RSs. One or more SS blocks, or one or more CSI-RSresources, associated with a CSI-RS resource index (CRI), or one or moreDM-RSs of PBCH, may be used as RS for measuring quality of a beam pairlink. Quality of a beam pair link may be defined as a reference signalreceived power (RSRP) value, or a reference signal received quality(RSRQ) value, and/or a CSI value measured on RS resources. The basestation may indicate whether an RS resource, used for measuring a beampair link quality, is quasi-co-located (QCLed) with DM-RSs of a controlchannel. A RS resource and DM-RSs of a control channel may be calledQCLed when a channel characteristics from a transmission on an RS to awireless device, and that from a transmission on a control channel to awireless device, are similar or same under a configured criterion. In amulti-beam operation, a wireless device may perform an uplink beamsweeping to access a cell.

In an example, a wireless device may be configured to monitor PDCCH onone or more beam pair links simultaneously depending on a capability ofa wireless device. This may increase robustness against beam pair linkblocking. A base station may transmit one or more messages to configurea wireless device to monitor PDCCH on one or more beam pair links indifferent PDCCH OFDM symbols. For example, a base station may transmithigher layer signaling (e.g. RRC signaling) or MAC CE comprisingparameters related to the Rx beam setting of a wireless device formonitoring PDCCH on one or more beam pair links. A base station maytransmit indication of spatial QCL assumption between an DL RS antennaport(s) (for example, cell-specific CSI-RS, or wireless device-specificCSI-RS, or SS block, or PBCH with or without DM-RSs of PBCH), and DL RSantenna port(s) for demodulation of DL control channel. Signaling forbeam indication for a PDCCH may be MAC CE signaling, or RRC signaling,or DCI signaling, or specification-transparent and/or implicit method,and combination of these signaling methods.

For reception of unicast DL data channel, a base station may indicatespatial QCL parameters between DL RS antenna port(s) and DM-RS antennaport(s) of DL data channel. The base station may transmit DCI (e.g.downlink grants) comprising information indicating the RS antennaport(s). The information may indicate RS antenna port(s) which may beQCLed with the DM-RS antenna port(s). Different set of DM-RS antennaport(s) for a DL data channel may be indicated as QCL with different setof the RS antenna port(s).

FIG. 9A is an example of beam sweeping in a DL channel. In anRRC_INACTIVE state or RRC_IDLE state, a wireless device may assume thatSS blocks form an SS burst 940, and an SS burst set 950. The SS burstset 950 may have a given periodicity. For example, in a multi-beamoperation, a base station 120 may transmit SS blocks in multiple beams,together forming a SS burst 940. One or more SS blocks may betransmitted on one beam. If multiple SS bursts 940 are transmitted withmultiple beams, SS bursts together may form SS burst set 950.

A wireless device may further use CSI-RS in the multi-beam operation forestimating a beam quality of a links between a wireless device and abase station. A beam may be associated with a CSI-RS. For example, awireless device may, based on a RSRP measurement on CSI-RS, report abeam index, as indicated in a CRI for downlink beam selection, andassociated with a RSRP value of a beam. A CSI-RS may be transmitted on aCSI-RS resource including at least one of one or more antenna ports, oneor more time or frequency radio resources. A CSI-RS resource may beconfigured in a cell-specific way by common RRC signaling, or in awireless device-specific way by dedicated RRC signaling, and/or L1/L2signaling. Multiple wireless devices covered by a cell may measure acell-specific CSI-RS resource. A dedicated subset of wireless devicescovered by a cell may measure a wireless device-specific CSI-RSresource.

A CSI-RS resource may be transmitted periodically, or using aperiodictransmission, or using a multi-shot or semi-persistent transmission. Forexample, in a periodic transmission in FIG. 9A, a base station 120 maytransmit configured CSI-RS resources 940 periodically using a configuredperiodicity in a time domain. In an aperiodic transmission, a configuredCSI-RS resource may be transmitted in a dedicated time slot. In amulti-shot or semi-persistent transmission, a configured CSI-RS resourcemay be transmitted within a configured period. Beams used for CSI-RStransmission may have different beam width than beams used for SS-blockstransmission.

FIG. 9B is an example of a beam management procedure in an example newradio network. A base station 120 and/or a wireless device 110 mayperform a downlink L1/L2 beam management procedure. One or more of thefollowing downlink L1/L2 beam management procedures may be performedwithin one or more wireless devices 110 and one or more base stations120. In an example, a P-1 procedure 910 may be used to enable thewireless device 110 to measure one or more Transmission (Tx) beamsassociated with the base station 120 to support a selection of a firstset of Tx beams associated with the base station 120 and a first set ofRx beam(s) associated with a wireless device 110. For beamforming at abase station 120, a base station 120 may sweep a set of different TXbeams. For beamforming at a wireless device 110, a wireless device 110may sweep a set of different Rx beams. In an example, a P-2 procedure920 may be used to enable a wireless device 110 to measure one or moreTx beams associated with a base station 120 to possibly change a firstset of Tx beams associated with a base station 120. A P-2 procedure 920may be performed on a possibly smaller set of beams for beam refinementthan in the P-1 procedure 910. A P-2 procedure 920 may be a special caseof a P-1 procedure 910. In an example, a P-3 procedure 930 may be usedto enable a wireless device 110 to measure at least one Tx beamassociated with a base station 120 to change a first set of Rx beamsassociated with a wireless device 110.

A wireless device 110 may transmit one or more beam management reportsto a base station 120. In one or more beam management reports, awireless device 110 may indicate some beam pair quality parameters,comprising at least, one or more beam identifications; RSRP; PrecodingMatrix Indicator (PMI)/Channel Quality Indicator (CQI)/Rank Indicator(RI) of a subset of configured beams. Based on one or more beammanagement reports, a base station 120 may transmit to a wireless device110 a signal indicating that one or more beam pair links are one or moreserving beams. A base station 120 may transmit PDCCH and PDSCH for awireless device 110 using one or more serving beams.

In an example embodiment, new radio network may support a BandwidthAdaptation (BA). In an example, receive and/or transmit bandwidthsconfigured by an UE employing a BA may not be large. For example, areceive and/or transmit bandwidths may not be as large as a bandwidth ofa cell. Receive and/or transmit bandwidths may be adjustable. Forexample, a UE may change receive and/or transmit bandwidths, e.g., toshrink during period of low activity to save power. For example, a UEmay change a location of receive and/or transmit bandwidths in afrequency domain, e.g. to increase scheduling flexibility. For example,a UE may change a subcarrier spacing, e.g. to allow different services.

In an example embodiment, a subset of a total cell bandwidth of a cellmay be referred to as a Bandwidth Part (BWP). A base station mayconfigure a UE with one or more BWPs to achieve a BA. For example, abase station may indicate, to a UE, which of the one or more(configured) BWPs is an active BWP.

FIG. 10 is an example diagram of 3 BWPs configured: BWP1 (1010 and 1050)with a width of 40 MHz and subcarrier spacing of 15 kHz; BWP2 (1020 and1040) with a width of 10 MHz and subcarrier spacing of 15 kHz; BWP3 1030with a width of 20 MHz and subcarrier spacing of 60 kHz.

In an example, a UE, configured for operation in one or more BWPs of acell, may be configured by one or more higher layers (e.g. RRC layer)for a cell a set of one or more BWPs (e.g., at most four BWPs) forreceptions by the UE (DL BWP set) in a DL bandwidth by at least oneparameter DL-BWP and a set of one or more BWPs (e.g., at most four BWPs)for transmissions by a UE (UL BWP set) in an UL bandwidth by at leastone parameter UL-BWP for a cell.

To enable BA on the PCell, a base station may configure a UE with one ormore UL and DL BWP pairs. To enable BA on SCells (e.g., in case of CA),a base station may configure a UE at least with one or more DL BWPs(e.g., there may be none in an UL).

In an example, an initial active DL BWP may be defined by at least oneof a location and number of contiguous PRBs, a subcarrier spacing, or acyclic prefix, for a control resource set for at least one common searchspace. For operation on the PCell, one or more higher layer parametersmay indicate at least one initial UL BWP for a random access procedure.If a UE is configured with a secondary carrier on a primary cell, the UEmay be configured with an initial BWP for random access procedure on asecondary carrier.

In an example, for unpaired spectrum operation, a UE may expect that acenter frequency for a DL BWP may be same as a center frequency for a ULBWP.

For example, for a DL BWP or an UL BWP in a set of one or more DL BWPsor one or more UL BWPs, respectively, a base station maysemi-statistically configure a UE for a cell with one or more parametersindicating at least one of following: a subcarrier spacing; a cyclicprefix; a number of contiguous PRBs; an index in the set of one or moreDL BWPs and/or one or more UL BWPs; a link between a DL BWP and an ULBWP from a set of configured DL BWPs and UL BWPs; a DCI detection to aPDSCH reception timing; a PDSCH reception to a HARQ-ACK transmissiontiming value; a DCI detection to a PUSCH transmission timing value; anoffset of a first PRB of a DL bandwidth or an UL bandwidth,respectively, relative to a first PRB of a bandwidth.

In an example, for a DL BWP in a set of one or more DL BWPs on a PCell,a base station may configure a UE with one or more control resource setsfor at least one type of common search space and/or one UE-specificsearch space. For example, a base station may not configure a UE withouta common search space on a PCell, or on a PSCell, in an active DL BWP.

For an UL BWP in a set of one or more UL BWPs, a base station mayconfigure a UE with one or more resource sets for one or more PUCCHtransmissions.

In an example, if a DCI comprises a BWP indicator field, a BWP indicatorfield value may indicate an active DL BWP, from a configured DL BWP set,for one or more DL receptions. If a DCI comprises a BWP indicator field,a BWP indicator field value may indicate an active UL BWP, from aconfigured UL BWP set, for one or more UL transmissions.

In an example, for a PCell, a base station may semi-statisticallyconfigure a UE with a default DL BWP among configured DL BWPs. If a UEis not provided a default DL BWP, a default BWP may be an initial activeDL BWP.

In an example, a base station may configure a UE with a timer value fora PCell. For example, a UE may start a timer, referred to as BWPinactivity timer, when a UE detects a DCI indicating an active DL BWP,other than a default DL BWP, for a paired spectrum operation or when aUE detects a DCI indicating an active DL BWP or UL BWP, other than adefault DL BWP or UL BWP, for an unpaired spectrum operation. The UE mayincrement the timer by an interval of a first value (e.g., the firstvalue may be 1 millisecond or 0.5 milliseconds) if the UE does notdetect a DCI during the interval for a paired spectrum operation or foran unpaired spectrum operation. In an example, the timer may expire whenthe timer is equal to the timer value. A UE may switch to the default DLBWP from an active DL BWP when the timer expires.

In an example, a base station may semi-statistically configure a UE withone or more BWPs. A UE may switch an active BWP from a first BWP to asecond BWP in response to receiving a DCI indicating the second BWP asan active BWP and/or in response to an expiry of BWP inactivity timer(for example, the second BWP may be a default BWP). For example, FIG. 10is an example diagram of 3 BWPs configured, BWP1 (1010 and 1050), BWP2(1020 and 1040), and BWP3 (1030). BWP2 (1020 and 1040) may be a defaultBWP. BWP1 (1010) may be an initial active BWP. In an example, a UE mayswitch an active BWP from BWP1 1010 to BWP2 1020 in response to anexpiry of BWP inactivity timer. For example, a UE may switch an activeBWP from BWP2 1020 to BWP3 1030 in response to receiving a DCIindicating BWP3 1030 as an active BWP. Switching an active BWP from BWP31030 to BWP2 1040 and/or from BWP2 1040 to BWP1 1050 may be in responseto receiving a DCI indicating an active BWP and/or in response to anexpiry of BWP inactivity timer.

In an example, if a UE is configured for a secondary cell with a defaultDL BWP among configured DL BWPs and a timer value, UE procedures on asecondary cell may be same as on a primary cell using the timer valuefor the secondary cell and the default DL BWP for the secondary cell.

In an example, if a base station configures a UE with a first active DLBWP and a first active UL BWP on a secondary cell or carrier, a UE mayemploy an indicated DL BWP and an indicated UL BWP on a secondary cellas a respective first active DL BWP and first active UL BWP on asecondary cell or carrier.

FIG. 11A and FIG. 11B show packet flows employing a multi connectivity(e.g. dual connectivity, multi connectivity, tight interworking, and/orthe like). FIG. 11A is an example diagram of a protocol structure of awireless device 110 (e.g. UE) with CA and/or multi connectivity as peran aspect of an embodiment. FIG. 11B is an example diagram of a protocolstructure of multiple base stations with CA and/or multi connectivity asper an aspect of an embodiment. The multiple base stations may comprisea master node, MN 1130 (e.g. a master node, a master base station, amaster gNB, a master eNB, and/or the like) and a secondary node, SN 1150(e.g. a secondary node, a secondary base station, a secondary gNB, asecondary eNB, and/or the like). A master node 1130 and a secondary node1150 may co-work to communicate with a wireless device 110.

When multi connectivity is configured for a wireless device 110, thewireless device 110, which may support multiple reception/transmissionfunctions in an RRC connected state, may be configured to utilize radioresources provided by multiple schedulers of a multiple base stations.Multiple base stations may be inter-connected via a non-ideal or idealbackhaul (e.g. Xn interface, X2 interface, and/or the like). A basestation involved in multi connectivity for a certain wireless device mayperform at least one of two different roles: a base station may eitheract as a master base station or as a secondary base station. In multiconnectivity, a wireless device may be connected to one master basestation and one or more secondary base stations. In an example, a masterbase station (e.g. the MN 1130) may provide a master cell group (MCG)comprising a primary cell and/or one or more secondary cells for awireless device (e.g. the wireless device 110). A secondary base station(e.g. the SN 1150) may provide a secondary cell group (SCG) comprising aprimary secondary cell (PSCell) and/or one or more secondary cells for awireless device (e.g. the wireless device 110).

In multi connectivity, a radio protocol architecture that a beareremploys may depend on how a bearer is setup. In an example, threedifferent type of bearer setup options may be supported: an MCG bearer,an SCG bearer, and/or a split bearer. A wireless device mayreceive/transmit packets of an MCG bearer via one or more cells of theMCG, and/or may receive/transmits packets of an SCG bearer via one ormore cells of an SCG. Multi-connectivity may also be described as havingat least one bearer configured to use radio resources provided by thesecondary base station. Multi-connectivity may or may not beconfigured/implemented in some of the example embodiments.

In an example, a wireless device (e.g. Wireless Device 110) may transmitand/or receive: packets of an MCG bearer via an SDAP layer (e.g. SDAP1110), a PDCP layer (e.g. NR PDCP 1111), an RLC layer (e.g. MN RLC1114), and a MAC layer (e.g. MN MAC 1118); packets of a split bearer viaan SDAP layer (e.g. SDAP 1110), a PDCP layer (e.g. NR PDCP 1112), one ofa master or secondary RLC layer (e.g. MN RLC 1115, SN RLC 1116), and oneof a master or secondary MAC layer (e.g. MN MAC 1118, SN MAC 1119);and/or packets of an SCG bearer via an SDAP layer (e.g. SDAP 1110), aPDCP layer (e.g. NR PDCP 1113), an RLC layer (e.g. SN RLC 1117), and aMAC layer (e.g. MN MAC 1119).

In an example, a master base station (e.g. MN 1130) and/or a secondarybase station (e.g. SN 1150) may transmit/receive: packets of an MCGbearer via a master or secondary node SDAP layer (e.g. SDAP 1120, SDAP1140), a master or secondary node PDCP layer (e.g. NR PDCP 1121, NR PDCP1142), a master node RLC layer (e.g. MN RLC 1124, MN RLC 1125), and amaster node MAC layer (e.g. MN MAC 1128); packets of an SCG bearer via amaster or secondary node SDAP layer (e.g. SDAP 1120, SDAP 1140), amaster or secondary node PDCP layer (e.g. NR PDCP 1122, NR PDCP 1143), asecondary node RLC layer (e.g. SN RLC 1146, SN RLC 1147), and asecondary node MAC layer (e.g. SN MAC 1148); packets of a split bearervia a master or secondary node SDAP layer (e.g. SDAP 1120, SDAP 1140), amaster or secondary node PDCP layer (e.g. NR PDCP 1123, NR PDCP 1141), amaster or secondary node RLC layer (e.g. MN RLC 1126, SN RLC 1144, SNRLC 1145, MN RLC 1127), and a master or secondary node MAC layer (e.g.MN MAC 1128, SN MAC 1148).

In multi connectivity, a wireless device may configure multiple MACentities: one MAC entity (e.g. MN MAC 1118) for a master base station,and other MAC entities (e.g. SN MAC 1119) for a secondary base station.In multi-connectivity, a configured set of serving cells for a wirelessdevice may comprise two subsets: an MCG comprising serving cells of amaster base station, and SCGs comprising serving cells of a secondarybase station. For an SCG, one or more of following configurations may beapplied: at least one cell of an SCG has a configured UL CC and at leastone cell of a SCG, named as primary secondary cell (PSCell, PCell ofSCG, or sometimes called PCell), is configured with PUCCH resources;when an SCG is configured, there may be at least one SCG bearer or oneSplit bearer; upon detection of a physical layer problem or a randomaccess problem on a PSCell, or a number of NR RLC retransmissions hasbeen reached associated with the SCG, or upon detection of an accessproblem on a PSCell during a SCG addition or a SCG change: an RRCconnection re-establishment procedure may not be triggered, ULtransmissions towards cells of an SCG may be stopped, a master basestation may be informed by a wireless device of a SCG failure type, forsplit bearer, a DL data transfer over a master base station may bemaintained; an NR RLC acknowledged mode (AM) bearer may be configuredfor a split bearer; PCell and/or PSCell may not be de-activated; PSCellmay be changed with a SCG change procedure (e.g. with security keychange and a RACH procedure); and/or a bearer type change between asplit bearer and a SCG bearer or simultaneous configuration of a SCG anda split bearer may or may not supported.

With respect to interaction between a master base station and asecondary base stations for multi-connectivity, one or more of thefollowing may be applied: a master base station and/or a secondary basestation may maintain RRM measurement configurations of a wirelessdevice; a master base station may (e.g. based on received measurementreports, traffic conditions, and/or bearer types) may decide to requesta secondary base station to provide additional resources (e.g. servingcells) for a wireless device; upon receiving a request from a masterbase station, a secondary base station may create/modify a containerthat may result in configuration of additional serving cells for awireless device (or decide that the secondary base station has noresource available to do so); for a UE capability coordination, a masterbase station may provide (a part of) an AS configuration and UEcapabilities to a secondary base station; a master base station and asecondary base station may exchange information about a UE configurationby employing of RRC containers (inter-node messages) carried via Xnmessages; a secondary base station may initiate a reconfiguration of thesecondary base station existing serving cells (e.g. PUCCH towards thesecondary base station); a secondary base station may decide which cellis a PSCell within a SCG; a master base station may or may not changecontent of RRC configurations provided by a secondary base station; incase of a SCG addition and/or a SCG SCell addition, a master basestation may provide recent (or the latest) measurement results for SCGcell(s); a master base station and secondary base stations may receiveinformation of SFN and/or subframe offset of each other from OAM and/orvia an Xn interface, (e.g. for a purpose of DRX alignment and/oridentification of a measurement gap). In an example, when adding a newSCG SCell, dedicated RRC signaling may be used for sending requiredsystem information of a cell as for CA, except for a SFN acquired from aMIB of a PSCell of a SCG.

FIG. 12 is an example diagram of a random access procedure. One or moreevents may trigger a random access procedure. For example, one or moreevents may be at least one of following: initial access from RRC_IDLE,RRC connection re-establishment procedure, handover, DL or UL dataarrival during RRC_CONNECTED when UL synchronization status isnon-synchronized, transition from RRC_Inactive, and/or request for othersystem information. For example, a PDCCH order, a MAC entity, and/or abeam failure indication may initiate a random access procedure.

In an example embodiment, a random access procedure may be at least oneof a contention based random access procedure and a contention freerandom access procedure. For example, a contention based random accessprocedure may comprise, one or more Msg 1 1220 transmissions, one ormore Msg2 1230 transmissions, one or more Msg3 1240 transmissions, andcontention resolution 1250. For example, a contention free random accessprocedure may comprise one or more Msg 1 1220 transmissions and one ormore Msg2 1230 transmissions.

In an example, a base station may transmit (e.g., unicast, multicast, orbroadcast), to a UE, a RACH configuration 1210 via one or more beams.The RACH configuration 1210 may comprise one or more parametersindicating at least one of following: available set of PRACH resourcesfor a transmission of a random access preamble, initial preamble power(e.g., random access preamble initial received target power), an RSRPthreshold for a selection of a SS block and corresponding PRACHresource, a power-ramping factor (e.g., random access preamble powerramping step), random access preamble index, a maximum number ofpreamble transmission, preamble group A and group B, a threshold (e.g.,message size) to determine the groups of random access preambles, a setof one or more random access preambles for system information requestand corresponding PRACH resource(s), if any, a set of one or more randomaccess preambles for beam failure recovery request and correspondingPRACH resource(s), if any, a time window to monitor RA response(s), atime window to monitor response(s) on beam failure recovery request,and/or a contention resolution timer.

In an example, the Msg1 1220 may be one or more transmissions of arandom access preamble. For a contention based random access procedure,a UE may select a SS block with a RSRP above the RSRP threshold. Ifrandom access preambles group B exists, a UE may select one or morerandom access preambles from a group A or a group B depending on apotential Msg3 1240 size. If a random access preambles group B does notexist, a UE may select the one or more random access preambles from agroup A. A UE may select a random access preamble index randomly (e.g.with equal probability or a normal distribution) from one or more randomaccess preambles associated with a selected group. If a base stationsemi-statistically configures a UE with an association between randomaccess preambles and SS blocks, the UE may select a random accesspreamble index randomly with equal probability from one or more randomaccess preambles associated with a selected SS block and a selectedgroup.

For example, a UE may initiate a contention free random access procedurebased on a beam failure indication from a lower layer. For example, abase station may semi-statistically configure a UE with one or morecontention free PRACH resources for beam failure recovery requestassociated with at least one of SS blocks and/or CSI-RSs. If at leastone of SS blocks with a RSRP above a first RSRP threshold amongstassociated SS blocks or at least one of CSI-RSs with a RSRP above asecond RSRP threshold amongst associated CSI-RSs is available, a UE mayselect a random access preamble index corresponding to a selected SSblock or CSI-RS from a set of one or more random access preambles forbeam failure recovery request.

For example, a UE may receive, from a base station, a random accesspreamble index via PDCCH or RRC for a contention free random accessprocedure. If a base station does not configure a UE with at least onecontention free PRACH resource associated with SS blocks or CSI-RS, theUE may select a random access preamble index. If a base stationconfigures a UE with one or more contention free PRACH resourcesassociated with SS blocks and at least one SS block with a RSRP above afirst RSRP threshold amongst associated SS blocks is available, the UEmay select the at least one SS block and select a random access preamblecorresponding to the at least one SS block. If a base station configuresa UE with one or more contention free PRACH resources associated withCSI-RSs and at least one CSI-RS with a RSRP above a second RSPRthreshold amongst the associated CSI-RSs is available, the UE may selectthe at least one CSI-RS and select a random access preamblecorresponding to the at least one CSI-RS.

A UE may perform one or more Msg1 1220 transmissions by transmitting theselected random access preamble. For example, if a UE selects an SSblock and is configured with an association between one or more PRACHoccasions and one or more SS blocks, the UE may determine an PRACHoccasion from one or more PRACH occasions corresponding to a selected SSblock. For example, if a UE selects a CSI-RS and is configured with anassociation between one or more PRACH occasions and one or more CSI-RSs,the UE may determine a PRACH occasion from one or more PRACH occasionscorresponding to a selected CSI-RS. A UE may transmit, to a basestation, a selected random access preamble via a selected PRACHoccasions. A UE may determine a transmit power for a transmission of aselected random access preamble at least based on an initial preamblepower and a power-ramping factor. A UE may determine a RA-RNTIassociated with a selected PRACH occasions in which a selected randomaccess preamble is transmitted. For example, a UE may not determine aRA-RNTI for a beam failure recovery request. A UE may determine anRA-RNTI at least based on an index of a first OFDM symbol and an indexof a first slot of a selected PRACH occasions, and/or an uplink carrierindex for a transmission of Msg1 1220.

In an example, a UE may receive, from a base station, a random accessresponse, Msg 2 1230. A UE may start a time window (e.g.,ra-ResponseWindow) to monitor a random access response. For beam failurerecovery request, a base station may configure a UE with a differenttime window (e.g., bfr-ResponseWindow) to monitor response on beamfailure recovery request. For example, a UE may start a time window(e.g., ra-ResponseWindow or bfr-ResponseWindow) at a start of a firstPDCCH occasion after a fixed duration of one or more symbols from an endof a preamble transmission. If a UE transmits multiple preambles, the UEmay start a time window at a start of a first PDCCH occasion after afixed duration of one or more symbols from an end of a first preambletransmission. A UE may monitor a PDCCH of a cell for at least one randomaccess response identified by a RA-RNTI or for at least one response tobeam failure recovery request identified by a C-RNTI while a timer for atime window is running.

In an example, a UE may consider a reception of random access responsesuccessful if at least one random access response comprises a randomaccess preamble identifier corresponding to a random access preambletransmitted by the UE. A UE may consider the contention free randomaccess procedure successfully completed if a reception of random accessresponse is successful. If a contention free random access procedure istriggered for a beam failure recovery request, a UE may consider acontention free random access procedure successfully complete if a PDCCHtransmission is addressed to a C-RNTI. In an example, if at least onerandom access response comprises a random access preamble identifier, aUE may consider the random access procedure successfully completed andmay indicate a reception of an acknowledgement for a system informationrequest to upper layers. If a UE has signaled multiple preambletransmissions, the UE may stop transmitting remaining preambles (if any)in response to a successful reception of a corresponding random accessresponse.

In an example, a UE may perform one or more Msg 3 1240 transmissions inresponse to a successful reception of random access response (e.g., fora contention based random access procedure). A UE may adjust an uplinktransmission timing based on a timing advanced command indicated by arandom access response and may transmit one or more transport blocksbased on an uplink grant indicated by a random access response.Subcarrier spacing for PUSCH transmission for Msg3 1240 may be providedby at least one higher layer (e.g. RRC) parameter. A UE may transmit arandom access preamble via PRACH and Msg3 1240 via PUSCH on a same cell.A base station may indicate an UL BWP for a PUSCH transmission of Msg31240 via system information block. A UE may employ HARQ for aretransmission of Msg 3 1240.

In an example, multiple UEs may perform Msg 1 1220 by transmitting asame preamble to a base station and receive, from the base station, asame random access response comprising an identity (e.g., TC-RNTI).Contention resolution 1250 may ensure that a UE does not incorrectly usean identity of another UE. For example, contention resolution 1250 maybe based on C-RNTI on PDCCH or a UE contention resolution identity onDL-SCH. For example, if a base station assigns a C-RNTI to a UE, the UEmay perform contention resolution 1250 based on a reception of a PDCCHtransmission that is addressed to the C-RNTI. In response to detectionof a C-RNTI on a PDCCH, a UE may consider contention resolution 1250successful and may consider a random access procedure successfullycompleted. If a UE has no valid C-RNTI, a contention resolution may beaddressed by employing a TC-RNTI. For example, if a MAC PDU issuccessfully decoded and a MAC PDU comprises a UE contention resolutionidentity MAC CE that matches the CCCH SDU transmitted in Msg3 1250, a UEmay consider the contention resolution 1250 successful and may considerthe random access procedure successfully completed.

FIG. 13 is an example structure for MAC entities as per an aspect of anembodiment. In an example, a wireless device may be configured tooperate in a multi-connectivity mode. A wireless device in RRC_CONNECTEDwith multiple RX/TX may be configured to utilize radio resourcesprovided by multiple schedulers located in a plurality of base stations.The plurality of base stations may be connected via a non-ideal or idealbackhaul over the Xn interface. In an example, a base station in aplurality of base stations may act as a master base station or as asecondary base station. A wireless device may be connected to one masterbase station and one or more secondary base stations. A wireless devicemay be configured with multiple MAC entities, e.g. one MAC entity formaster base station, and one or more other MAC entities for secondarybase station(s). In an example, a configured set of serving cells for awireless device may comprise two subsets: an MCG comprising servingcells of a master base station, and one or more SCGs comprising servingcells of a secondary base station(s). FIG. 13 illustrates an examplestructure for MAC entities when MCG and SCG are configured for awireless device.

In an example, at least one cell in a SCG may have a configured UL CC,wherein a cell of at least one cell may be called PSCell or PCell ofSCG, or sometimes may be simply called PCell. A PSCell may be configuredwith PUCCH resources. In an example, when a SCG is configured, there maybe at least one SCG bearer or one split bearer. In an example, upondetection of a physical layer problem or a random access problem on aPSCell, or upon reaching a number of RLC retransmissions associated withthe SCG, or upon detection of an access problem on a PSCell during a SCGaddition or a SCG change: an RRC connection re-establishment proceduremay not be triggered, UL transmissions towards cells of an SCG may bestopped, a master base station may be informed by a UE of a SCG failuretype and DL data transfer over a master base station may be maintained.

In an example, a MAC sublayer may provide services such as data transferand radio resource allocation to upper layers (e.g. 1310 or 1320). A MACsublayer may comprise a plurality of MAC entities (e.g. 1350 and 1360).A MAC sublayer may provide data transfer services on logical channels.To accommodate different kinds of data transfer services, multiple typesof logical channels may be defined. A logical channel may supporttransfer of a particular type of information. A logical channel type maybe defined by what type of information (e.g., control or data) istransferred. For example, BCCH, PCCH, CCCH and DCCH may be controlchannels and DTCH may be a traffic channel. In an example, a first MACentity (e.g. 1310) may provide services on PCCH, BCCH, CCCH, DCCH, DTCHand MAC control elements. In an example, a second MAC entity (e.g. 1320)may provide services on BCCH, DCCH, DTCH and MAC control elements.

A MAC sublayer may expect from a physical layer (e.g. 1330 or 1340)services such as data transfer services, signaling of HARQ feedback,signaling of scheduling request or measurements (e.g. CQI). In anexample, in dual connectivity, two MAC entities may be configured for awireless device: one for MCG and one for SCG. A MAC entity of wirelessdevice may handle a plurality of transport channels. In an example, afirst MAC entity may handle first transport channels comprising a PCCHof MCG, a first BCH of MCG, one or more first DL-SCHs of MCG, one ormore first UL-SCHs of MCG and one or more first RACHs of MCG. In anexample, a second MAC entity may handle second transport channelscomprising a second BCH of SCG, one or more second DL-SCHs of SCG, oneor more second UL-SCHs of SCG and one or more second RACHs of SCG.

In an example, if a MAC entity is configured with one or more SCells,there may be multiple DL-SCHs and there may be multiple UL-SCHs as wellas multiple RACHs per MAC entity. In an example, there may be one DL-SCHand UL-SCH on a SpCell. In an example, there may be one DL-SCH, zero orone UL-SCH and zero or one RACH for an SCell. A DL-SCH may supportreceptions using different numerologies and/or TTI duration within a MACentity. A UL-SCH may also support transmissions using differentnumerologies and/or TTI duration within the MAC entity.

In an example, a MAC sublayer may support different functions and maycontrol these functions with a control (e.g. 1355 or 1365) element.Functions performed by a MAC entity may comprise mapping between logicalchannels and transport channels (e.g., in uplink or downlink),multiplexing (e.g. 1352 or 1362) of MAC SDUs from one or differentlogical channels onto transport blocks (TB) to be delivered to thephysical layer on transport channels (e.g., in uplink), demultiplexing(e.g. 1352 or 1362) of MAC SDUs to one or different logical channelsfrom transport blocks (TB) delivered from the physical layer ontransport channels (e.g., in downlink), scheduling information reporting(e.g., in uplink), error correction through HARQ in uplink or downlink(e.g. 1363), and logical channel prioritization in uplink (e.g. 1351 or1361). A MAC entity may handle a random access process (e.g. 1354 or1364).

FIG. 14 is an example diagram of a RAN architecture comprising one ormore base stations. In an example, a protocol stack (e.g. RRC, SDAP,PDCP, RLC, MAC, and PHY) may be supported at a node. A base station(e.g. gNB 120A or 120B) may comprise a base station central unit (CU)(e.g. gNB-CU 1420A or 1420B) and at least one base station distributedunit (DU) (e.g. gNB-DU 1430A, 1430B, 1430C, or 1430D) if a functionalsplit is configured. Upper protocol layers of a base station may belocated in a base station CU, and lower layers of the base station maybe located in the base station DUs. An F1 interface (e.g. CU-DUinterface) connecting a base station CU and base station DUs may be anideal or non-ideal backhaul. F1-C may provide a control plane connectionover an F1 interface, and F1-U may provide a user plane connection overthe F1 interface. In an example, an Xn interface may be configuredbetween base station CUs.

In an example, a base station CU may comprise an RRC function, an SDAPlayer, and a PDCP layer, and base station DUs may comprise an RLC layer,a MAC layer, and a PHY layer. In an example, various functional splitoptions between a base station CU and base station DUs may be possibleby locating different combinations of upper protocol layers (RANfunctions) in a base station CU and different combinations of lowerprotocol layers (RAN functions) in base station DUs. A functional splitmay support flexibility to move protocol layers between a base stationCU and base station DUs depending on service requirements and/or networkenvironments.

In an example, functional split options may be configured per basestation, per base station CU, per base station DU, per UE, per bearer,per slice, or with other granularities. In per base station CU split, abase station CU may have a fixed split option, and base station DUs maybe configured to match a split option of a base station CU. In per basestation DU split, a base station DU may be configured with a differentsplit option, and a base station CU may provide different split optionsfor different base station DUs. In per UE split, a base station (basestation CU and at least one base station DUs) may provide differentsplit options for different wireless devices. In per bearer split,different split options may be utilized for different bearers. In perslice splice, different split options may be applied for differentslices.

FIG. 15 is an example diagram showing RRC state transitions of awireless device. In an example, a wireless device may be in at least oneRRC state among an RRC connected state (e.g. RRC Connected 1530,RRC_Connected), an RRC idle state (e.g. RRC Idle 1510, RRC_Idle), and/oran RRC inactive state (e.g. RRC Inactive 1520, RRC_Inactive). In anexample, in an RRC connected state, a wireless device may have at leastone RRC connection with at least one base station (e.g. gNB and/or eNB),which may have a UE context of the wireless device. A UE context (e.g. awireless device context) may comprise at least one of an access stratumcontext, one or more radio link configuration parameters, bearer (e.g.data radio bearer (DRB), signaling radio bearer (SRB), logical channel,QoS flow, PDU session, and/or the like) configuration information,security information, PHY/MAC/RLC/PDCP/SDAP layer configurationinformation, and/or the like configuration information for a wirelessdevice. In an example, in an RRC idle state, a wireless device may nothave an RRC connection with a base station, and a UE context of awireless device may not be stored in a base station. In an example, inan RRC inactive state, a wireless device may not have an RRC connectionwith a base station. A UE context of a wireless device may be stored ina base station, which may be called as an anchor base station (e.g. lastserving base station).

In an example, a wireless device may transition a UE RRC state betweenan RRC idle state and an RRC connected state in both ways (e.g.connection release 1540 or connection establishment 1550; or connectionreestablishment) and/or between an RRC inactive state and an RRCconnected state in both ways (e.g. connection inactivation 1570 orconnection resume 1580). In an example, a wireless device may transitionits RRC state from an RRC inactive state to an RRC idle state (e.g.connection release 1560).

In an example, an anchor base station may be a base station that maykeep a UE context (a wireless device context) of a wireless device atleast during a time period that a wireless device stays in a RANnotification area (RNA) of an anchor base station, and/or that awireless device stays in an RRC inactive state. In an example, an anchorbase station may be a base station that a wireless device in an RRCinactive state was lastly connected to in a latest RRC connected stateor that a wireless device lastly performed an RNA update procedure in.In an example, an RNA may comprise one or more cells operated by one ormore base stations. In an example, a base station may belong to one ormore RNAs. In an example, a cell may belong to one or more RNAs.

In an example, a wireless device may transition a UE RRC state from anRRC connected state to an RRC inactive state in a base station. Awireless device may receive RNA information from the base station. RNAinformation may comprise at least one of an RNA identifier, one or morecell identifiers of one or more cells of an RNA, a base stationidentifier, an IP address of the base station, an AS context identifierof the wireless device, a resume identifier, and/or the like.

In an example, an anchor base station may broadcast a message (e.g. RANpaging message) to base stations of an RNA to reach to a wireless devicein an RRC inactive state, and/or the base stations receiving the messagefrom the anchor base station may broadcast and/or multicast anothermessage (e.g. paging message) to wireless devices in their coveragearea, cell coverage area, and/or beam coverage area associated with theRNA through an air interface.

In an example, when a wireless device in an RRC inactive state movesinto a new RNA, the wireless device may perform an RNA update (RNAU)procedure, which may comprise a random access procedure by the wirelessdevice and/or a UE context retrieve procedure. A UE context retrieve maycomprise: receiving, by a base station from a wireless device, a randomaccess preamble; and fetching, by a base station, a UE context of thewireless device from an old anchor base station. Fetching may comprise:sending a retrieve UE context request message comprising a resumeidentifier to the old anchor base station and receiving a retrieve UEcontext response message comprising the UE context of the wirelessdevice from the old anchor base station.

In an example embodiment, a wireless device in an RRC inactive state mayselect a cell to camp on based on at least a on measurement results forone or more cells, a cell where a wireless device may monitor an RNApaging message and/or a core network paging message from a base station.In an example, a wireless device in an RRC inactive state may select acell to perform a random access procedure to resume an RRC connectionand/or to transmit one or more packets to a base station (e.g. to anetwork). In an example, if a cell selected belongs to a different RNAfrom an RNA for a wireless device in an RRC inactive state, the wirelessdevice may initiate a random access procedure to perform an RNA updateprocedure. In an example, if a wireless device in an RRC inactive statehas one or more packets, in a buffer, to transmit to a network, thewireless device may initiate a random access procedure to transmit oneor more packets to a base station of a cell that the wireless deviceselects. A random access procedure may be performed with two messages(e.g. 2 stage random access) and/or four messages (e.g. 4 stage randomaccess) between the wireless device and the base station.

In an example embodiment, a base station receiving one or more uplinkpackets from a wireless device in an RRC inactive state may fetch a UEcontext of a wireless device by transmitting a retrieve UE contextrequest message for the wireless device to an anchor base station of thewireless device based on at least one of an AS context identifier, anRNA identifier, a base station identifier, a resume identifier, and/or acell identifier received from the wireless device. In response tofetching a UE context, a base station may transmit a path switch requestfor a wireless device to a core network entity (e.g. AMF, MME, and/orthe like). A core network entity may update a downlink tunnel endpointidentifier for one or more bearers established for the wireless devicebetween a user plane core network entity (e.g. UPF, S-GW, and/or thelike) and a RAN node (e.g. the base station), e.g. changing a downlinktunnel endpoint identifier from an address of the anchor base station toan address of the base station.

A gNB may communicate with a wireless device via a wireless networkemploying one or more new radio technologies. The one or more radiotechnologies may comprise at least one of: multiple technologies relatedto physical layer; multiple technologies related to medium accesscontrol layer; and/or multiple technologies related to radio resourcecontrol layer. Example embodiments of enhancing the one or more radiotechnologies may improve performance of a wireless network. Exampleembodiments may increase the system throughput, or data rate oftransmission. Example embodiments may reduce battery consumption of awireless device. Example embodiments may improve latency of datatransmission between a gNB and a wireless device. Example embodimentsmay improve network coverage of a wireless network. Example embodimentsmay improve transmission efficiency of a wireless network.

Example Downlink Control Information (DCI)

In an example, a gNB may transmit a DCI via a PDCCH for at least one of:scheduling assignment/grant; slot format notification; pre-emptionindication; and/or power-control commends. More specifically, the DCImay comprise at least one of: identifier of a DCI format; downlinkscheduling assignment(s); uplink scheduling grant(s); slot formatindicator; pre-emption indication; power-control for PUCCH/PUSCH; and/orpower-control for SRS.

In an example, a downlink scheduling assignment DCI may compriseparameters indicating at least one of: identifier of a DCI format; PDSCHresource indication; transport format; HARQ information; controlinformation related to multiple antenna schemes; and/or a command forpower control of the PUCCH.

In an example, an uplink scheduling grant DCI may comprise parametersindicating at least one of: identifier of a DCI format; PUSCH resourceindication; transport format; HARQ related information; and/or a powercontrol command of the PUSCH.

In an example, different types of control information may correspond todifferent DCI message sizes. For example, supporting multiple beamsand/or spatial multiplexing in the spatial domain and noncontiguousallocation of RBs in the frequency domain may require a largerscheduling message, in comparison with an uplink grant allowing forfrequency-contiguous allocation. DCI may be categorized into differentDCI formats, where a format corresponds to a certain message size and/orusage.

In an example, a wireless device may monitor one or more PDCCH fordetecting one or more DCI with one or more DCI format, in common searchspace or wireless device-specific search space. In an example, awireless device may monitor PDCCH with a limited set of DCI format, tosave power consumption. The more DCI format to be detected, the morepower be consumed at the wireless device.

In an example, the information in the DCI formats for downlinkscheduling may comprise at least one of: identifier of a DCI format;carrier indicator; frequency domain resource assignment; time domainresource assignment; bandwidth part indicator; HARQ process number; oneor more MCS; one or more NDI; one or more RV; MIMO related information;Downlink assignment index (DAI); PUCCH resource indicator;PDSCH-to-HARQ_feedback timing indicator; TPC for PUCCH; SRS request; andpadding if necessary. In an example, the MIMO related information maycomprise at least one of: PMI; precoding information; transport blockswap flag; power offset between PDSCH and reference signal;reference-signal scrambling sequence; number of layers; and/or antennaports for the transmission; and/or Transmission Configuration Indication(TCI).

In an example, the information in the DCI formats used for uplinkscheduling may comprise at least one of: an identifier of a DCI format;carrier indicator; bandwidth part indication; resource allocation type;frequency domain resource assignment; time domain resource assignment;MCS; NDI; Phase rotation of the uplink DMRS; precoding information; CSIrequest; SRS request; Uplink index/DAI; TPC for PUSCH; and/or padding ifnecessary.

In an example, a gNB may perform CRC scrambling for a DCI, beforetransmitting the DCI via a PDCCH. The gNB may perform CRC scrambling bybinary addition of multiple bits of at least one wireless deviceidentifier (e.g., C-RNTI, CS-RNTI, TPC-CS-RNTI, TPC-PUCCH-RNTI,TPC-PUSCH-RNTI, SP CSI C-RNTI, or TPC-SRS-RNTI) and the CRC bits of theDCI. The wireless device may check the CRC bits of the DCI, whendetecting the DCI. The wireless device may receive the DCI when the CRCis scrambled by a sequence of bits that is the same as the at least onewireless device identifier.

In an example, in order to support wide bandwidth operation, a gNB maytransmit one or more PDCCH in different control resource sets(coresets). A gNB may transmit one or more RRC message comprisingconfiguration parameters of one or more coresets. A coreset may compriseat least one of: a first OFDM symbol; a number of consecutive OFDMsymbols; a set of resource blocks; a CCE-to-REG mapping. In an example,a gNB may transmit a PDCCH in a dedicated coreset for particularpurpose, for example, for beam failure recovery confirmation.

In an example, a wireless device may monitor PDCCH for detecting DCI inone or more configured coresets, to reduce the power consumption.

Example MAC PDU Structure.

A gNB may transmit one or more MAC PDU to a wireless device. In anexample, a MAC PDU may be a bit string that is byte aligned (e.g.,multiple of eight bits) in length. In an example, bit strings may berepresented by tables in which the most significant bit is the leftmostbit of the first line of the table, and the least significant bit is therightmost bit on the last line of the table, and more generally, the bitstring may be read from the left to right and then in the reading orderof the lines. In an example, the bit order of a parameter field within aMAC PDU is represented with the first and most significant bit in theleftmost bit and the last and least significant bit in the rightmostbit.

In an example, a MAC SDU may be a bit string that is byte aligned (e.g.,multiple of eight bits) in length. In an example, a MAC SDU may beincluded into a MAC PDU from the first bit onward.

In an example, a MAC CE may be a bit string that is byte aligned (e.g.,multiple of eight bits) in length.

In an example, a MAC subheader may be a bit string that is byte aligned(e.g., multiple of eight bits) in length. In an example, a MAC subheadermay be placed immediately in front of the corresponding MAC SDU, or MACCE, or padding.

In an example, a MAC entity may ignore a value of reserved bits in a DLMAC PDU.

In an example, a MAC PDU may comprise one or more MAC subPDUs. a MACsubPDU of the one or more MAC subPDUs may comprise at least one of: aMAC subheader only (including padding); a MAC subheader and a MAC SDU; aMAC subheader and a MAC CE; and/or a MAC subheader and padding. In anexample, the MAC SDU may be of variable size. In an example, a MACsubheader may correspond to a MAC SDU, or a MAC CE, or padding.

In an example, a MAC subheader may comprise: an R field with one bit; aF field with one bit in length; a LCID field with multiple bits inlength; a L field with multiple bits in length, when the MAC subheadercorresponds to a MAC SDU, or a variable-sized MAC CE, or padding.

In an example, a MAC subheader may comprise an eight-bit L field. In theexample, the LCID field may have six bits in length, and the L field mayhave eight bits in length. In an example, a MAC subheader may comprise asixteen-bit L field. In the example, the LCID field may have six bits inlength, and the L field may have sixteen bits in length.

In an example, a MAC subheader may comprise: a R field with two bits inlength; and a LCID field with multiple bits in length, when the MACsubheader corresponds to a fixed sized MAC CE, or padding. In anexample, the LCID field may have six bits in length, and the R field mayhave two bits in length.

In an example DL MAC PDU, multiple MAC CEs may be placed together. A MACsubPDU comprising MAC CE may be placed before any MAC subPDU comprisinga MAC SDU, or a MAC subPDU comprising padding.

In an example UL MAC PDU, multiple MAC CEs may be placed together. A MACsubPDU comprising MAC CE may be placed after all MAC subPDU comprising aMAC SDU. The MAC subPDU may be placed before a MAC subPDU comprisingpadding.

In an example, a MAC entity of a gNB may transmit to a MAC entity of awireless device one or more MAC CEs. In an example, multiple LCIDs maybe associated with the one or more MAC CEs. In the example, the one ormore MAC CEs may comprise at least one of: a SP ZP CSI-RS Resource SetActivation/Deactivation MAC CE; a PUCCH spatial relationActivation/Deactivation MAC CE; a SP SRS Activation/Deactivation MAC CE;a SP CSI reporting on PUCCH Activation/Deactivation MAC CE; a TCI StateIndication for UE-specific PDCCH MAC CE; a TCI State Indication forUE-specific PDSCH MAC CE; an Aperiodic CSI Trigger State SubselectionMAC CE; a SP CSI-RS/CSI-IM Resource Set Activation/Deactivation MAC CE;a UE contention resolution identity MAC CE; a timing advance command MACCE; a DRX command MAC CE; a Long DRX command MAC CE; a SCellactivation/deactivation MAC CE (1 Octet); a SCellactivation/deactivation MAC CE (4 Octet); and/or a duplicationactivation/deactivation MAC CE. In an example, a MAC CE may have a LCIDin the corresponding MAC subheader. Different MAC CE may have differentLCID in the corresponding MAC subheader. For example, the LCID with111011 in a MAC subheader may indicate a MAC CE associated with the MACsubheader is a long DRX command MAC CE.

In an example, the MAC entity of the wireless device may transmit to theMAC entity of the gNB one or more MAC CEs. In an example, the one ormore MAC CEs may comprise at least one of: a short buffer status report(BSR) MAC CE; a long BSR MAC CE; a C-RNTI MAC CE; a configured grantconfirmation MAC CE; a single entry PHR MAC CE; a multiple entry PHR MACCE; a short truncated BSR; and/or a long truncated BSR. In an example, aMAC CE may have a LCID in the corresponding MAC subheader. Different MACCE may have different LCID in the corresponding MAC subheader. Forexample, the LCID with 111011 in a MAC subheader may indicate a MAC CEassociated with the MAC subheader is a short-truncated command MAC CE.

Example of Carrier Aggregation

In a carrier aggregation (CA), two or more component carriers (CCs) maybe aggregated. A wireless device may simultaneously receive or transmiton one or more CCs depending on capabilities of the wireless device. Inan example, the CA may be supported for contiguous CCs. In an example,the CA may be supported for non-contiguous CCs.

When configured with a CA, a wireless device may have one RRC connectionwith a network. During an RRC connectionestablishment/re-establishment/handover, a cell providing a NAS mobilityinformation may be a serving cell. During an RRC connectionre-establishment/handover procedure, a cell providing a security inputmay be a serving cell. In an example, the serving cell may be referredto as a primary cell (PCell). In an example, a gNB may transmit, to awireless device, one or more messages comprising configurationparameters of a plurality of one or more secondary cells (SCells),depending on capabilities of the wireless device.

When configured with CA, a base station and/or a wireless device mayemploy an activation/deactivation mechanism of an SCell for an efficientbattery consumption. When a wireless device is configured with one ormore SCells, a gNB may activate or deactivate at least one of the one ormore SCells. Upon configuration of an SCell, the SCell may bedeactivated.

In an example, a wireless device may activate/deactivate an SCell inresponse to receiving an SCell Activation/Deactivation MAC CE.

In an example, a base station may transmit, to a wireless device, one ormore messages comprising an sCellDeactivationTimer timer. In an example,a wireless device may deactivate an SCell in response to an expiry ofthe sCellDeactivationTimer timer.

When a wireless device receives an SCell Activation/Deactivation MAC CEactivating an SCell, the wireless device may activate the SCell. Inresponse to the activating the SCell, the wireless device may performoperations comprising SRS transmissions on the SCell, CQI/PMI/RI/CRIreporting for the SCell on a PCell, PDCCH monitoring on the SCell, PDCCHmonitoring for the SCell on the PCell, and/or PUCCH transmissions on theSCell.

In an example, in response to the activating the SCell, the wirelessdevice may start or restart an sCellDeactivationTimer timer associatedwith the SCell. The wireless device may start the sCellDeactivationTimertimer in the slot when the SCell Activation/Deactivation MAC CE has beenreceived. In an example, in response to the activating the SCell, thewireless device may (re-)initialize one or more suspended configureduplink grants of a configured grant Type 1 associated with the SCellaccording to a stored configuration. In an example, in response to theactivating the SCell, the wireless device may trigger PHR.

In an example, when a wireless device receives an SCellActivation/Deactivation MAC CE deactivating an activated SCell, thewireless device may deactivate the activated SCell.

In an example, when an sCellDeactivationTimer timer associated with anactivated SCell expires, the wireless device may deactivate theactivated SCell. In response to the deactivating the activated SCell,the wireless device may stop the sCellDeactivationTimer timer associatedwith the activated SCell. In an example, in response to the deactivatingthe activated SCell, the wireless device may clear one or moreconfigured downlink assignments and/or one or more configured uplinkgrant Type 2 associated with the activated SCell. In an example, inresponse to the deactivating the activated SCell, the wireless devicemay further suspend one or more configured uplink grant Type 1associated with the activated SCell. The wireless device may flush HARQbuffers associated with the activated SCell.

In an example, when an SCell is deactivated, a wireless device may notperform operations comprising transmitting SRS on the SCell, reportingCQI/PMI/RI/CRI for the SCell on a PCell, transmitting on UL-SCH on theSCell, transmitting on RACH on the SCell, monitoring at least one firstPDCCH on the SCell, monitoring at least one second PDCCH for the SCellon the PCell, transmitting a PUCCH on the SCell.

In an example, when at least one first PDCCH on an activated SCellindicates an uplink grant or a downlink assignment, a wireless devicemay restart an sCellDeactivationTimer timer associated with theactivated SCell. In an example, when at least one second PDCCH on aserving cell (e.g. a PCell or an SCell configured with PUCCH, i.e. PUCCHSCell) scheduling the activated SCell indicates an uplink grant or adownlink assignment for the activated SCell, a wireless device mayrestart an sCellDeactivationTimer timer associated with the activatedSCell.

In an example, when an SCell is deactivated, if there is an ongoingrandom access procedure on the SCell, a wireless device may abort theongoing random access procedure on the SCell.

Example of SCell Activation/Deactivation MAC-CE

An example SCell Activation/Deactivation MAC CE may comprise one octet.A first MAC PDU subheader with a first LCID may identify the SCellActivation/Deactivation MAC CE of one octet. The SCellActivation/Deactivation MAC CE of one octet may have a fixed size. TheSCell Activation/Deactivation MAC CE of one octet may comprise a singleoctet. The single octet may comprise a first number of C-fields (e.g.seven) and a second number of R-fields (e.g. one).

An example SCell Activation/Deactivation MAC CE may comprise fouroctets. A second MAC PDU subheader with a second LCID may identify theSCell Activation/Deactivation MAC CE of four octets. The SCellActivation/Deactivation MAC CE of four octets may have a fixed size. TheSCell Activation/Deactivation MAC CE of four octets may comprise fouroctets. The four octets may comprise a third number of C-fields (e.g.31) and a fourth number of R-fields (e.g. 1).

In an example, a C_(i) field may indicate an activation/deactivationstatus of an SCell with an SCell index i, if a SCell with SCell index iis configured. In an example, when the C_(i) field is set to one, anSCell with an SCell index i may be activated. In an example, when theC_(i) field is set to zero, an SCell with an SCell index i may bedeactivated. In an example, if there is no SCell configured with SCellindex i, the wireless device may ignore the C_(i) field. In an example,an R field may indicate a reserved bit. The R field may be set to zero.

Example of Random-Access Procedure

In an example, a base station may transmit, to a wireless device, one ormore messages indicating random access parameters. For example, the oneor more messages may be broadcast RRC message, wireless device specificRRC message, and/or combination thereof. For example, the one or moremessage may comprise at least one of RACH-ConfigCommon,RACH-ConfigGeneric, and RACH-ConfigDedicated. For example, for acontention based random access procedure, a wireless device may receive,from a base station, at least RACH-ConfigCommon and RACH-ConfigGeneric.For example, for a contention free random access procedure, a wirelessdevice may receive, from a base station, at least RACH-ConfigDedicated.

For example, a random access procedure may be initiated in differentways based at least on one of RACH-ConfigCommon, RACH-ConfigGeneric, andRACH-ConfigDedicated. For example, the random access procedure may beinitiated by a PDCCH order transmitted by a base station, by the MACentity of a wireless device, or by RRC. There may be one random accessprocedure ongoing at any point in time in a MAC entity. The randomaccess procedure on an SCell may be initiated by a PDCCH order withra-Preamblelndex different from 0b000000. For example, if the MAC entityof a wireless device receives a request for a random access procedurewhile another is already ongoing in the MAC entity, a wireless devicemay continue with the ongoing procedure or start with the new procedure(e.g. for SI request).

In an example, a base station may transmit one or more RRC message toconfigure a wireless device at least one of following parameters:

-   -   prach-ConfigIndex: the available set of PRACH occasions for the        transmission of the Random Access Preamble    -   preambleReceivedTargetPower: initial Random Access Preamble        power;    -   rsrp-ThresholdSSB: an RSRP threshold for the selection of the        SSB and corresponding Random Access Preamble and/or PRACH        occasion. If the Random Access procedure is initiated for beam        failure recovery, rsrp-ThresholdSSB refers to rsrp-ThresholdSSB        in BeamFailureRecoveryConfig IE;    -   rsrp-ThresholdCSI-RS: an RSRP threshold for the selection of        CSI-RS and corresponding Random Access Preamble and/or PRACH        occasion. If the Random Access procedure is initiated for beam        failure recovery, rsrp-ThresholdCSI-RS shall be set to a value        calculated by multiplying rsrp-ThresholdSSB in        BeamFailureRecoveryConfig IE by powerControlOffset;        rsrp-ThresholdSSB-SUL: an RSRP threshold for the selection        between the NUL carrier and the SUL carrier;    -   powerControlOffset: a power offset between rsrp-ThresholdSSB and        rsrp-ThresholdCSI-RS to be used when the Random Access procedure        is initiated for beam failure recovery;        powerRampingStep: the power-ramping factor;        powerRampingStepHighPriority: the power-ramping factor in case        of differentiated Random Access procedure    -   ra-Preamblelndex: Random Access Preamble;    -   ra-ssb-OccasionMaskIndex: defines PRACH occasion(s) associated        with an SSB in which the MAC entity may transmit a Random Access        Preamble;    -   ra-OccasionList: defines PRACH occasion(s) associated with a        CSI-RS in which the MAC entity may transmit a Random Access        Preamble;    -   preambleTransMax: the maximum number of Random Access Preamble        transmission ssb-perRACH-OccasionAndCB-PreamblesPerSSB: defines        the number of SSBs mapped to each PRACH occasion and the number        of Random Access Preambles mapped to each SSB;    -   the set of Random Access Preambles and/or PRACH occasions for SI        request, if any; the set of Random Access Preambles and/or PRACH        occasions for beam failure recovery request, if any;    -   ra-ResponseWindow: the time window to monitor RA response(s);    -   ra-ContentionResolutionTimer: the Contention Resolution Timer

In an example, a random access procedure may be initiated for beamfailure detection and recovery. For example, a wireless device may beconfigured by RRC with a beam failure recovery procedure which may beused for indicating to the serving base station of a SSB or CSI-RS whenbeam failure is detected on the serving SSB(s)/CSI-RS(s). Beam failuremay be detected by counting beam failure instance indication from thelower layers to the MAC entity. For example, a base station mayconfigure, via RRC, the following parameters in theBeamFailureRecoveryConfig for the Beam Failure Detection and Recoveryprocedure:

-   -   beamFailurelnstanceMaxCount for the beam failure detection;    -   beamFailureDetectionTimer for the beam failure detection;    -   beamFailureRecoveryTimer for the beam failure recovery        procedure;    -   rsrp-ThresholdSSB: an RSRP threshold for the beam failure        recovery;    -   powerRampingStep: powerRampingStep for the beam failure        recovery;    -   preambleReceivedTargetPower: preambleReceivedTargetPower for the        beam failure recovery;    -   preambleTransMax: preambleTransMax for the beam failure        recovery;    -   ra-ResponseWindow: the time window to monitor response(s) for        the beam failure recovery using contention-free Random Access        Preamble;    -   prach-ConfigIndex: prach-ConfigIndex for the beam failure        recovery;    -   ra-ssb-OccasionMaskIndex: ra-ssb-OccasionMaskIndex for the beam        failure recovery;    -   ra-OccasionList: ra-OccasionList for the beam failure recovery.

In an example, a wireless device may employ one or more parameters for arandom access procedure. For example, a wireless device may employ atleast one of PREAMBLE_INDEX; PREAMBLE_TRANSMISSION_COUNTER;PREAMBLE_POWER_RAMPING_COUNTER; PREAMBLE_POWER_RAMPING_STEP;PREAMBLE_RECEIVED_TARGET_POWER; PREAMBLE_BACKOFF; PCMAX;SCALING_FACTOR_BI; and TEMPORARY_C-RNTI.

In an example, a wireless device may perform random access resourceselection for selecting one or more preambles and one or more PRACHoccasion (or resources comprising time, frequency, and/or code). Forexample, there may be one or more cases that a random access proceduremay be initiated for beam failure recovery; and/or thebeamFailureRecoveryTimer is either running or not configured; and/or thecontention-free Random Access Resources for beam failure recoveryrequest associated with any of the SSBs and/or CSI-RSs have beenexplicitly provided by RRC; and/or at least one of the SSBs with SS-RSRPabove rsrp-ThresholdSSB amongst the SSBs in candidateBeamRSList or theCSI-RSs with CSI-RSRP above rsrp-ThresholdCSI-RS amongst the CSI-RSs incandidateBeamRSList is available. In this case, a wireless device mayselect an SSB with SS-RSRP above rsrp-ThresholdSSB amongst the SSBs incandidateBeamRSList or a CSI-RS with CSI-RSRP above rsrp-ThresholdCSI-RSamongst the CSI-RSs in candidateBeamRSList. For example, if CSI-RS isselected, and there is no ra-Preamblelndex associated with the selectedCSI-RS, a wireless device may set the PREAMBLE_INDEX to ara-Preamblelndex corresponding to the SSB in candidateBeamRSList whichis quasi-collocated with the selected CSI-RS, otherwise the wirelessdevice may set the PREAMBLE_INDEX to a ra-Preamblelndex corresponding tothe selected SSB or CSI-RS from the set of Random Access Preambles forbeam failure recovery request.

For example, there may be one or more cases that a random accessprocedure may be initiated and/or a ra-Preamblelndex has been explicitlyprovided by either PDCCH or RRC; and/or the ra-Preamblelndex is not0b000000; and/or contention-free Random Access Resource associated withSSBs or CSI-RSs have not been explicitly provided by RRC. In this case,a wireless device may set the PREAMBLE_INDEX to the signaledra-Preamblelndex.

For example, there may be one or more cases that a random accessprocedure may be initiated and/or the contention-free Random AccessResources associated with SSBs have been explicitly provided by RRC andat least one SSB with SS-RSRP above rsrp-ThresholdSSB amongst theassociated SSBs is available. In this case, a wireless device may selectan SSB with SS-RSRP above rsrp-ThresholdSSB amongst the associated SSBs.For example, the wireless device may set the PREAMBLE_INDEX to ara-Preamblelndex corresponding to the selected SSB.

For example, there may be one or more cases that a random accessprocedure may be initiated and the contention-free Random AccessResources associated with CSI-RSs have been explicitly provided by RRCand at least one CSI-RS with CSI-RSRP above rsrp-ThresholdCSI-RS amongstthe associated CSI-RSs is available. In this case, a wireless device mayselect a CSI-RS with CSI-RSRP above rsrp-ThresholdCSI-RS amongst theassociated CSI-RSs. for example, the wireless device may set thePREAMBLE_INDEX to a ra-Preamblelndex corresponding to the selectedCSI-RS.

For example, there may be one or more cases that a random accessprocedure may be initiated and at least one of the SSBs with SS-RSRPabove rsrp-ThresholdSSB is available. In this case, for example, awireless device may select an SSB with SS-RSRP above rsrp-ThresholdSSB,otherwise may select any SSB. For example, a random access resourceselection is performed when Msg3 is being retransmitted, a wirelessdevice may select the same group of Random Access Preambles as was usedfor the Random Access Preamble transmission attempt corresponding to thefirst transmission of Msg3. For example, if the association betweenRandom Access Preambles and SSBs is configured, a wireless device mayselect a ra-PreambleIndex randomly with equal probability from theRandom Access Preambles associated with the selected SSB and theselected Random Access Preambles group. For example, if the associationbetween Random Access Preambles and SSBs is not configured, a wirelessdevice may select a ra-Preamblelndex randomly with equal probabilityfrom the Random Access Preambles within the selected Random AccessPreambles group. For example, a wireless device may set thePREAMBLE_INDEX to the selected ra-Preamblelndex.

In an example, if an SSB is selected above and an association betweenPRACH occasions and SSBs is configured, a wireless device may determinethe next available PRACH occasion from the PRACH occasions correspondingto the selected SSB permitted by the restrictions given by thera-ssb-OccasionMaskIndex if configured (the MAC entity of the wirelessdevice may select a PRACH occasion randomly with equal probabilityamongst the PRACH occasions occurring simultaneously but on differentsubcarriers, corresponding to the selected SSB; the MAC entity may takeinto account the possible occurrence of measurement gaps whendetermining the next available PRACH occasion corresponding to theselected SSB).

In an example, if a CSI-RS is selected above and an association betweenPRACH occasions and CSI-RSs is configured. a wireless device maydetermine the next available PRACH occasion from the PRACH occasions inra-OccasionList corresponding to the selected CSI-RS (the MAC entityshall select a PRACH occasion randomly with equal probability amongstthe PRACH occasions occurring simultaneously but on differentsubcarriers, corresponding to the selected CSI-RS; the MAC entity maytake into account the possible occurrence of measurement gaps whendetermining the next available PRACH occasion corresponding to theselected CSI-RS).

In an example, if a CSI-RS is selected above and there is nocontention-free Random Access Resource associated with the selectedCSI-RS, a wireless device may determine the next available PRACHoccasion from the PRACH occasions, permitted by the restrictions givenby the ra-ssb-OccasionMaskIndex if configured, corresponding to the SSBin candidateBeamRSList which is quasi-collocated with the selectedCSI-RS (the MAC entity may take into account the possible occurrence ofmeasurement gaps when determining the next available PRACH occasioncorresponding to the SSB which is quasi-collocated with the selectedCSI-RS).

For example, a wireless device may determine the next available PRACHoccasion (the MAC entity shall select a PRACH occasion randomly withequal probability amongst the PRACH occasions occurring simultaneouslybut on different subcarriers; the MAC entity may take into account thepossible occurrence of measurement gaps when determining the nextavailable PRACH occasion).

For example, based on a selected PREABLE INDEX and PRACH occasion, awireless device may perform the random access preamble transmission. Forexample, if the notification of suspending power ramping counter has notbeen received from lower layers; and/or if SSB selected is not changed(i.e. same as the previous Random Access Preamble transmission), awireless device may increment PREAMBLE_POWER_RAMPING_COUNTER by 1. thewireless device may select a value of DELTA_PREAMBLE that may bepredefined and/or semi-statistically configured by a base station andset PREAMBLE_RECEIVED_TARGET_POWER topreambleReceivedTargetPower+DELTA_PREAMBLE+(PREAMBLE_POWER_RAMPING_COUNTER−1)×PREAMBLE_POWER_RAMPING_STEP.The wireless device may instruct the physical layer to transmit theRandom Access Preamble using the selected PRACH, corresponding RA-RNTI(if available), PREAMBLE_INDEX and PREAMBLE_RECEIVED_TARGET_POWER. Forexample, the wireless device may compute an RA-RNTI associated with thePRACH occasion in which the Random Access Preamble is transmitted, e.g.,The RA-RNTI associated with the PRACH in which the Random AccessPreamble is transmitted, may be computed as:RA-RNTI=1+s_id+14×t_id+14×80×f_id+14×80×8×ul_carrier_idwhere s_id is the index of the first OFDM symbol of the specified PRACH(0≤s_id<14), t_id is the index of the first slot of the specified PRACHin a system frame (0≤t_id<80), f_id is the index of the specified PRACHin the frequency domain (0≤f_id<8), and ul_carrier_id is the UL carrierused for Msg1 transmission (0 for NUL carrier, and 1 for SUL carrier).

FIG. 16 shows an example of a BWP operation on a PCell.

FIG. 17 shows an example of a BWP operation on an SCell.

In an example, with Bandwidth Adaptation (BA), a receive and a transmitbandwidth of a wireless device may not be as large as a bandwidth of acell. The receive bandwidth and/or the transmit bandwidth of thewireless device may be adjusted. In an example, the width of the receivebandwidth and/or the transmit bandwidth may be ordered to change (e.g.or to shrink during period of low activity to save power). In anexample, the location of the receive bandwidth and/or the transmitbandwidth may move in the frequency domain (e.g. to increase schedulingflexibility). In an example, the subcarrier spacing of the receivebandwidth and/or the transmit bandwidth may be ordered to change (e.g.to allow different services). A subset of the total cell bandwidth of acell may be referred to as a Bandwidth Part (BWP). The BA may beachieved by configuring the wireless device with one or more BWPs andtelling the wireless device which of the configured one or more BWPs iscurrently the active BWP.

A base station (gNB) may configure a wireless device (UE) with uplink(UL) bandwidth parts (BWPs) and downlink (DL) BWPs to enable bandwidthadaptation (BA) on a PCell. If carrier aggregation is configured, thegNB may configure the UE with at least DL BWP(s) (i.e. there may be noUL BWPS in the UL) to enable BA on an SCell.

In an example, in FIG. 16, for the PCell, an initial BWP may be a BWPused for initial access. In an example, the wireless device may operateon the initial BWP (e.g., initial UL/DL BWP) during the initial access.

In an example, in FIG. 17, for the SCell, an initial BWP may be a BWPconfigured for the UE to first operate at the SCell when the SCell isactivated. In an example, in response to the SCell being activated, thewireless device may operate on the initial BWP.

In an example, a base station may configure a wireless device with oneor more BWPs. In paired spectrum (e.g. FDD), a wireless device mayswitch a first DL BWP and a first UL BWP of the one or more BWPsindependently. In unpaired spectrum (e.g. TDD), a wireless device mayswitch a second DL BWP and a second UL BWP of the one or more BWPssimultaneously. Switching between the configured one or more BWPs mayhappen via a DCI or an inactivity timer (e.g., BWP inactivity timer). Inan example, when the inactivity timer is configured for a serving cell,an expiry of the inactivity timer associated to that cell may switch anactive BWP of the serving cell to a default BWP. The default BWP may beconfigured by the network.

In an example, for FDD systems, when configured with BA, one UL BWP foreach uplink carrier (e.g., SUL, NUL) and one DL BWP may be active at atime in an active serving cell. BWPs other than the one UL BWP and theone DL BWP that the UE may be configured with may be deactivated.

In an example, for TDD systems, one DL/UL BWP pair may be active at atime in an active serving cell. BWPs other than the one DL/UL BWP pairthat the UE may be configured with may be deactivated.

In an example, operating on the one UL BWP and the one DL BWP (or theone DL/UL pair) may enable reasonable UE battery consumption. Ondeactivated BWPs, the UE may not monitor PDCCH, may not transmit onPUCCH, PRACH and UL-SCH.

In an example, when configured with BA, a wireless device may monitor afirst PDCCH on an active BWP of a serving cell. In an example, thewireless device may not monitor a second PDCCH on an entire DLfrequency/bandwidth of the cell. In an example, the wireless device maynot monitor the second PDCCH on deactivated BWPs. In an example, a BWPinactivity timer may be used to switch the active BWP to a default BWPof the serving cell. In an example, the wireless device may (re)-startthe BWP inactivity timer in response to successful PDCCH decoding on theserving cell. In an example, the wireless device may switch to thedefault BWP in response to an expiry of the BWP inactivity timer.

In an example, a wireless device may be configured with one or more BWPsfor a serving cell (e.g., PCell, SCell). In an example, the serving cellmay be configured with at most a first number (e.g., four) BWPs (e.g.,BWP0-BWP3 in FIG. 16 and FIG. 17). In an example, for an activatedserving cell, there may be one active BWP at any point in time.

In an example, a BWP switching for a serving cell may be used toactivate an inactive BWP and deactivate an active BWP at a time. In anexample, the BWP switching may be controlled by a PDCCH indicating adownlink assignment or an uplink grant. In an example, the BWP switchingmay be controlled by an inactivity timer (e.g. bwp-InactivityTimer). Inan example, the BWP switching may be controlled by a MAC entity inresponse to initiating a Random Access procedure. In an example, the BWPswitching may be controlled by an RRC signaling.

In an example, in response to RRC (re-)configuration offirstActiveDownlinkBWP-Id (e.g., included in RRC signaling) and/orfirstActiveUplinkBWP-Id (e.g., included in RRC signaling) for a servingcell (e.g., SpCell), the wireless device may activate a DL BWP indicatedby the firstActiveDownlinkBWP-Id and/or an UL BWP indicated by thefirstActiveUplinkBWP-Id, respectively without receiving a PDCCHindicating a downlink assignment or an uplink grant. In an example, inresponse to an activation of an SCell, the wireless device may activatea DL BWP indicated by the firstActiveDownlinkBWP-Id and/or an UL BWPindicated by the firstActiveUplinkBWP-Id, respectively without receivinga PDCCH indicating a downlink assignment or an uplink grant.

In an example, an active BWP for a serving cell may be indicated by RRCsignaling and/or PDCCH. In an example, for unpaired spectrum (e.g.,time-division-duplex (TDD)), a DL BWP may be paired with a UL BWP, andBWP switching may be common (e.g., simultaneous) for the UL BWP and theDL BWP.

In an example, for an active BWP of an activated serving cell (e.g.,PCell, SCell) configured with one or more BWPs, a wireless device mayperform, on the active BWP, at least one of: transmitting on UL-SCH onthe active BWP; transmitting on RACH on the active BWP if PRACHoccasions are configured; monitoring a PDCCH on the active BWP;transmitting, if configured, PUCCH on the active BWP; reporting CSI forthe active BWP; transmitting, if configured, SRS on the active BWP;receiving DL-SCH on the active BWP; (re-) initializing any suspendedconfigured uplink grants of configured grant Type 1 on the active BWPaccording to a stored configuration, if any, and to start in a symbolbased on some procedures.

In an example, for a deactivated BWP of an activated serving cellconfigured with one or more BWPs, a wireless device may not perform atleast one of: transmitting on UL-SCH on the deactivated BWP;transmitting on RACH on the deactivated BWP; monitoring a PDCCH on thedeactivated BWP; transmitting PUCCH on the deactivated BWP; reportingCSI for the deactivated BWP; transmitting SRS on the deactivated BWP,receiving DL-SCH on the deactivated BWP. In an example, for adeactivated BWP of an activated serving cell configured with one or moreBWPs, a wireless device may clear any configured downlink assignment andconfigured uplink grant of configured grant Type 2 on the deactivatedBWP; may suspend any configured uplink grant of configured Type 1 on thedeactivated (or inactive) BWP.

In an example, a wireless device may initiate a random-access procedure(e.g., contention-based random access, contention-free random access) ona serving cell (e.g., PCell, SCell).

In an example, the base station may configure PRACH occasions for anactive UL BWP of the serving cell of the wireless device. In an example,the active UL BWP may be identified with an uplink BWP ID (e.g., bwp-Idconfigured by higher layers (RRC)). In an example, the serving cell maybe an SpCell. In an example, an active DL BWP of the serving cell of thewireless device may be identified with a downlink BWP ID (e.g., bwp-Idconfigured by higher layers (RRC)). In an example, the uplink BWP ID maybe different from the downlink BWP ID. In an example, when the wirelessdevice initiates the random-access procedure and the base stationconfigures PRACH occasions for the active UL BWP and the serving cell isan SpCell, in response to the downlink BWP ID of the active DL BWP beingdifferent from the uplink BWP ID of the active UL BWP, a MAC entity ofthe wireless device may switch from the active DL BWP to a DL BWP, ofthe serving cell, identified with a second downlink BWP ID. In anexample, the switching from the active DL BWP to the DL BWP may comprisesetting the DL BWP as a second active DL BWP of the serving cell. In anexample, the second downlink BWP ID may be the same as the uplink BWPID. In response to the switching, the MAC entity may perform therandom-access procedure on the DL BWP (e.g., the second active DL BWP)of the serving cell (e.g., SpCell) and the active UL BWP of the servingcell. In an example, in response to the initiating the random-accessprocedure, the wireless device may stop, if running, a BWP inactivitytimer (e.g., bwp-InactivityTimer configured by higher layers (RRC))associated with the DL BWP of the serving cell.

In an example, the base station may configure PRACH occasions for anactive UL BWP of the serving cell of the wireless device. In an example,the serving cell may not be an SpCell. In an example, the serving cellmay be an SCell. In an example, when the wireless device initiates therandom-access procedure and the base station configures PRACH occasionsfor the active UL BWP and the serving cell is not an SpCell, a MACentity of the wireless device may perform the random-access procedure ona first active DL BWP of an SpCell (e.g., PCell) and the active UL BWPof the serving cell. In an example, in response to the initiating therandom-access procedure, the wireless device may stop, if running, asecond BWP inactivity timer (e.g., bwp-InactivityTimer configured byhigher layers (RRC)) associated with a second active DL BWP of theserving cell. In an example, in response to the initiating therandom-access procedure and the serving cell being the SCell, thewireless device may stop, if running, a first BWP inactivity timer(e.g., bwp-InactivityTimer configured by higher layers (RRC)) associatedwith the first active DL BWP of the SpCell.

In an example, the base station may not configure PRACH occasions for anactive UL BWP of the serving cell of the wireless device. In an example,when the wireless device initiates the random-access procedure on theserving cell, in response to the PRACH occasions not being configuredfor the active UL BWP of the serving cell, a MAC entity of the wirelessdevice may switch from the active UL BWP to an uplink BWP (initialuplink BWP) of the serving cell. In an example, the uplink BWP may beindicated by an RRC signaling (e.g., initialUplinkBWP). In an example,the switching from the active UL BWP to the uplink BWP may comprisesetting the uplink BWP as a current active UL BWP of the serving cell.In an example, the serving cell may be an SpCell. In an example, whenthe wireless device initiates the random-access procedure on the servingcell and the PRACH occasions are not configured for the active UL BWP ofthe serving cell, in response to the serving cell being an SpCell, theMAC entity may switch from an active DL BWP of the serving cell to adownlink BWP (e.g., initial downlink BWP) of the serving cell. In anexample, the downlink BWP may be indicated by an RRC signaling (e.g.,initialDownlinkBWP). In an example, the switching from the active DL BWPto the downlink BWP may comprise setting the downlink BWP as a currentactive DL BWP of the serving cell. In response to the switching, the MACentity may perform the random-access procedure on the uplink BWP of theserving cell and the downlink BWP of the serving cell. In an example, inresponse to the initiating the random-access procedure, the wirelessdevice may stop, if running, a BWP inactivity timer (e.g.,bwp-InactivityTimer configured by higher layers (RRC)) associated withthe downlink BWP (e.g., the current active DL BWP) of the serving cell.

In an example, the base station may not configure PRACH occasions for anactive UL BWP of the serving cell (e.g., SCell) of the wireless device.In an example, when the wireless device initiates the random-accessprocedure on the serving cell, in response to the PRACH occasions notbeing configured for the active UL BWP of the serving cell, a MAC entityof the wireless device may switch from the active UL BWP to an uplinkBWP (initial uplink BWP) of the serving cell. In an example, the uplinkBWP may be indicated by an RRC signaling (e.g., initialUplinkBWP). In anexample, the switching from the active UL BWP to the uplink BWP maycomprise setting the uplink BWP as a current active UL BWP of theserving cell. In an example, the serving cell may not be an SpCell. Inan example, the serving cell may be an SCell. In an example, in responseto the serving cell not being the SpCell, the MAC entity may perform therandom-access procedure on the uplink BWP of the serving cell and anactive downlink BWP of an SpCell. In an example, in response to theinitiating the random-access procedure, the wireless device may stop, ifrunning, a second BWP inactivity timer (e.g., bwp-InactivityTimerconfigured by higher layers (RRC)) associated with a second active DLBWP of the serving cell. In an example, in response to the initiatingthe random-access procedure and the serving cell being the SCell, thewireless device may stop, if running, a first BWP inactivity timer(e.g., bwp-InactivityTimer configured by higher layers (RRC)) associatedwith the active DL BWP of the SpCell.

In an example, a MAC entity of a wireless device may receive a PDCCH fora BWP switching (e.g., UL BWP and/or DL BWP switching) of a servingcell. In an example, there may not be an ongoing random-access procedureassociated with the serving cell when the MAC entity receives the PDCCH.In an example, in response to not being an ongoing random-accessprocedure associated with the serving cell when the MAC entity receivesthe PDCCH for the BWP switching of the serving cell, the MAC entity mayperform the BWP switching to a BWP, of the serving cell, indicated bythe PDCCH.

In an example, a MAC entity of a wireless device may receive a PDCCH fora BWP switching (e.g., UL BWP and/or DL BWP switching) of a servingcell. In an example, the PDCCH may be addressed to C-RNTI of thewireless device. In an example, there may be an ongoing random-accessprocedure associated with the serving cell. In an example, the wirelessdevice may complete the ongoing random-access procedure associated withthe serving cell (successfully) in response to the receiving the PDCCHaddressed to the C-RNTI. In an example, in response to the completingthe ongoing random-access procedure associated with the serving cell(successfully), the MAC entity may perform the BWP switching to a BWP,of the serving cell, indicated by the PDCCH.

In an example, a MAC entity of a wireless device may receive a PDCCH fora BWP switching (e.g., UL BWP and/or DL BWP switching) for a servingcell. In an example, there may be an ongoing random-access procedureassociated with the serving cell in the MAC entity when the MAC entityreceives the PDCCH. In an example, in response to being an ongoingrandom-access procedure associated with the serving cell when the MACentity receives the PDCCH for the BWP switching of the serving cell, itmay be up to UE implementation whether to perform the BWP switching orignore the PDCCH for the BWP switching.

In an example, the MAC entity may perform the BWP switching in responseto the receiving the PDCCH for the BWP switching (other than successfulcontention resolution for the random-access procedure). In an example,the performing the BWP switching may comprise switching to a BWPindicated by the PDCCH. In an example, in response to the performing theBWP switching, the MAC entity may stop the ongoing random accessprocedure and may initiate a second random-access procedure after theperforming the BWP switching.

In an example, the MAC entity may ignore the PDCCH for the BWPswitching. In an example, in response to the ignoring the PDCCH for theBWP switching, the MAC entity may continue with the ongoing randomaccess procedure on the serving cell.

In an example, a base station may configure an activated serving cell ofa wireless device with a BWP inactivity timer.

In an example, the base station may configure the wireless device with adefault DL BWP ID for the activated serving cell (e.g., via RRCsignaling including defaultDownlinkBWP-Id parameter). In an example, anactive DL BWP of the activated serving cell may not be a BWP indicatedby the default DL BWP ID.

In an example, the base station may not configure the wireless devicewith a default DL BWP ID for the activated serving cell (e.g., via RRCsignaling including defaultDownlinkBWP-Id parameter). In an example, anactive DL BWP of the activated serving cell may not be an initialdownlink BWP (e.g., via RRC signaling including initialDownlinkBWPparameter) of the activated serving cell.

In an example, when the base station configures the wireless device withthe default DL BWP ID and the active DL BWP of the activated servingcell is not the BWP indicated by the default DL BWP ID; or when the basestation does not configure the wireless device with the default DL BWPID and the active DL BWP is not the initial downlink BWP, the wirelessdevice may start or restart the BWP inactivity timer associated with theactive DL BWP of the activated serving cell in response to receiving aPDCCH, on the active DL BWP, indicating a downlink assignment or anuplink grant (e.g., at time n+k in FIG. 16, m+l in FIG. 17). In anexample, the PDCCH may be addressed to C-RNTI. In an example, the PDCCHmay be addressed to CS-RNTI.

In an example, when the base station configures the wireless device withthe default DL BWP ID and the active DL BWP of the activated servingcell is not the BWP indicated by the default DL BWP ID; or when the basestation does not configure the wireless device with the default DL BWPID and the active DL BWP is not the initial downlink BWP, the wirelessdevice may start or restart the BWP inactivity timer associated with theactive DL BWP of the activated serving cell in response to receiving aPDCCH, for the active DL BWP, indicating a downlink assignment or anuplink grant. In an example, the PDCCH may be addressed to C-RNTI. In anexample, the PDCCH may be addressed to CS-RNTI.

In an example, the wireless device may receive the PDCCH when there isno ongoing random-access procedure associated with the activated servingcell. In an example, the wireless device may receive the PDCCH whenthere is an ongoing random-access procedure associated with theactivated serving cell and the ongoing random-access procedure iscompleted successfully in response to the receiving the PDCCH addressedto a C-RNTI of the wireless device.

In an example, when the base station configures the wireless device withthe default DL BWP ID and the active DL BWP of the activated servingcell is not the BWP indicated by the default DL BWP ID; or when the basestation does not configure the wireless device with the default DL BWPID and the active DL BWP is not the initial downlink BWP, the wirelessdevice may start or restart the BWP inactivity timer associated with theactive DL BWP of the activated serving cell in response to transmittinga first MAC PDU in a configured uplink grant or receiving a second MACPDU in a configured downlink assignment.

In an example, the wireless device may transmit the first MAC PDU and/orreceive the second MAC PDU when there is no ongoing random-accessprocedure associated with the activated serving cell.

In an example, the BWP inactivity timer associated with the active DLBWP of the activated serving cell may expire (e.g., at time o in FIG.16, at time s in FIG. 17).

In an example, the base station may configure the wireless device withthe default DL BWP ID. In an example, when the base station configuresthe wireless device with the default DL BWP ID, in response to the BWPinactivity timer expiring, a MAC entity of the wireless device mayperform BWP switching to a BWP indicated by the default DL BWP ID.

In an example, the base station may not configure the wireless devicewith the default DL BWP ID. In an example, when the base station doesnot configure the wireless device with the default DL BWP ID, inresponse to the BWP inactivity timer expiring, a MAC entity of thewireless device may perform BWP switching to the initial downlink BWP(e.g., initialDownlinkBWP in RRC signaling).

In an example, a wireless device may initiate a random-access procedureon a secondary cell (e.g., SCell). In an example, the wireless devicemay monitor for a random-access response for the random-access procedureon a SpCell. In an example, when the wireless device initiates therandom-access procedure on the secondary cell, the secondary cell andthe SpCell may be associated with the random-access procedure inresponse to the monitoring the random-access response to the SpCell.

In an example, a wireless device may receive a PDCCH for a BWP switching(e.g., UL and/or DL BWP switching). In an example, a MAC entity of thewireless device may switch from a first active DL BWP of the activatedserving cell to a BWP (e.g., DL BWP) of the activated serving cell inresponse to the receiving the PDCCH. In an example, the switching fromthe first active DL BWP to the BWP may comprise setting the BWP as acurrent active DL BWP of the activated serving cell. In an example, thewireless device may deactivate the first active DL BWP in response tothe switching.

In an example, the base station may configure the wireless device with adefault DL BWP ID. In an example, the BWP may not be indicated (oridentified) by the default DL BWP ID. In an example, when the basestation configures the wireless device with the default DL BWP ID andthe MAC entity of the wireless device switches from the first active DLBWP of the activated serving cell to the BWP, the wireless device maystart or restart the BWP inactivity timer associated with the BWP (e.g.,the current active DL BWP) in response to the BWP not being the defaultDL BWP (or the BWP not being indicated by the default DL BWP ID).

In an example, the base station may not configure the wireless devicewith a default DL BWP ID. In an example, the BWP may not be the initialdownlink BWP of the activated serving cell. In an example, when the basestation does not configure the wireless device with the default DL BWPID and the MAC entity of the wireless device switches from the firstactive DL BWP of the activated serving cell to the BWP, the wirelessdevice may start or restart the BWP inactivity timer associated with theBWP (e.g., the current active DL BWP) in response to the BWP not beingthe initial downlink BWP.

In an example, when configured with carrier aggregation (CA), a basestation may configure a wireless device with a secondary cell (e.g.,SCell). In an example, a wireless device may receive an SCellActivation/Deactivation MAC CE activating the secondary cell. In anexample, the secondary cell may be deactivated prior to the receivingthe SCell Activation/Deactivation MAC CE. In an example, when a wirelessdevice receives the SCell Activation/Deactivation MAC CE activating thesecondary cell, the wireless device may activate a downlink BWP of thesecondary cell and activate an uplink BWP of the secondary cell inresponse to the secondary cell being deactivated prior to the receivingthe SCell Activation/Deactivation MAC CE. In an example, the downlinkBWP may be indicated by the firstActiveDownlinkBWP-Id. In an example,the uplink BWP may be indicated by the firstActiveUplinkBWP-Id.

In an example, the base station may configure a wireless device with aBWP inactivity timer for the activated secondary cell. In an example, ansCellDeactivationTimer associated with the activated secondary cell mayexpire. In an example, in response to the sCellDeactivationTimerexpiring, the wireless device may stop the BWP inactivity timerassociated with the activated secondary cell. In an example, in responseto the sCellDeactivationTimer expiring, the wireless device maydeactivate an active downlink BWP (e.g., and an active UL BWP if exists)associated with the activated secondary cell.

In an example, when configured for operation in bandwidth parts (BWPs)of a serving cell, a wireless device (e.g., a UE) may be configured, byhigher layers with a parameter BWP-Downlink, a first set of BWPs (e.g.,at most four BWPs) for receptions, by the UE, (e.g., DL BWP set) in adownlink (DL) bandwidth for the serving cell.

In an example, when configured for operation in bandwidth parts (BWPs)of a serving cell, a wireless device (e.g., a UE) may be configured, byhigher layers with a parameter BWP-Uplink, a second set of BWPs (e.g.,at most four BWPs) for transmissions, by the UE, (e.g., UL BWP set) in auplink (UL) bandwidth for the serving cell.

In an example, the base station may not provide a wireless device with ahigher layer parameter initialDownlinkBWP. In response to the notproviding the wireless device with the higher layer parameterinitialDownlinkBWP, an initial active DL BWP may be defined, forexample, by a location and a number of contiguous PRBs, and a subcarrierspacing (SCS) and a cyclic prefix for PDCCH reception in a controlresource set (CORESET) for Type0-PDCCH common search space (CSS) set. Inan example, the contiguous PRBs may start from a first PRB with a lowestindex among PRBs of the CORESET for the Type0-PDCCH CSS set.

In an example, the base station may provide a wireless device with ahigher layer parameter initialDownlinkBWP. In an example, an initialactive DL BWP may be provided by the higher layer parameterinitialDownlinkBWP in response to the providing.

In an example, for operation on a cell (e.g., primary cell, secondarycell), a base station may provide a wireless device with an initialactive UL BWP by a higher layer parameter (e.g., initialUplinkBWP). Inan example, when configured with a supplementary uplink carrier (SUL),the base station may provide the wireless device with a second initialactive uplink BWP on the supplementary uplink carrier by a second higherlayer parameter (e.g., initialUplinkBWP in supplementaryUplink).

In an example, a wireless device may have a dedicated BWP configuration.

In an example, in response to the wireless device having the dedicatedBWP configuration, the wireless device may be provided by a higher layerparameter (e.g., firstActiveDownlinkBWP-Id). The higher layer parametermay indicate a first active DL BWP for receptions.

In an example, in response to the wireless device having the dedicatedBWP configuration, the wireless device may be provided by a higher layerparameter (e.g., firstActiveUplinkBWP-Id). The higher layer parametermay indicate a first active UL BWP for transmissions on a carrier (e.g.,SUL, NUL) of a serving cell (e.g., primary cell, secondary cell).

In an example, for a DL BWP in a first set of BWPs or an UL BWP in asecond set of BWPs, a base station may configure a wireless device for aserving cell with at least one of: a subcarrier spacing provided by ahigher layer parameter subcarrierSpacing; a cyclic prefix provided by ahigher layer parameter cyclicPrefix; an index in the first set of BWPsor in the second set of BWPs by a higher layer parameter bwp-Id (e.g.,bwp-Id); a third set of BWP-common and a fourth set of BWP-dedicatedparameters by a higher layer parameter bwp-N_(BWP)^(start)=O_(carrier)+RB_(start) In an example, a DL BWP index of a DLBWP may be same as an UL BWP index of an UL BWP. In an example, for anunpaired spectrum operation, a wireless device may not expect to receivea configuration (e.g., RRC configuration), where a first centerfrequency for the DL BWP is different from a second center frequency forthe UL BWP in response to the DL BWP index of the DL BWP being the sameas the UL BWP index of the UL BWP.

In an example, for a DL BWP in a first set of BWPs on a serving cell(e.g., primary cell), a base station may configure a wireless devicewith one or more control resource sets (CORESETs) for every type ofcommon search space (CSS) sets and for UE-specific search space (USS).In an example, the wireless device may not expect to be configuredwithout a common search space set on a primary cell (or on the PSCell),in an active DL BWP.

In an example, a base station may provide a wireless device with ahigher layer parameter controlResourceSetZero and a higher layerparameter searchSpaceZero in a higher layer parameter PDCCH-ConfigSIB1or a higher layer parameter PDCCH-ConfigCommon. In an example, inresponse to the providing, the wireless device may determine a CORESETfor a search space set from the higher layer parametercontrolResourcesetZero, and may determine corresponding PDCCH monitoringoccasions. An active DL BWP of a serving cell may not be an initial DLBWP of the serving cell. When the active DL BWP is not the initial DLBWP of the serving cell, the wireless device may determine the PDCCHmonitoring occasions for the search space set in response to a bandwidthof the CORESET being within the active DL BWP and the active DL BWPhaving the same SCS configuration and same cyclic prefix as the initialDL BWP.

In an example, for an UL BWP in a second set of BWPs of a serving cell(e.g., primary cell or PUCCH SCell), a base station may configure awireless device with one or more resource sets (e.g., time-frequencyresources/occasions) for PUCCH transmissions.

In an example, a UE may receive PDCCH and PDSCH in a DL BWP according toa configured subcarrier spacing and CP length for the DL BWP.

In an example, a UE may transmit PUCCH and PUSCH in an UL BWP accordingto a configured subcarrier spacing and CP length for the UL BWP.

In an example, a bandwidth part indicator field may be configured in aDCI format (e.g., DCI format 1_1). In an example, a value of thebandwidth part indicator field may indicate an active DL BWP, from afirst set of BWPs, for one or more DL receptions. In an example, thebandwidth part indicator field may indicate a DL BWP different from theactive DL BWP. In an example, in response to the bandwidth partindicator field indicating the DL BWP different from the active DL BWP,the wireless device may set the DL BWP as a current active DL BWP. In anexample, the setting the DL BWP as a current active DL BWP may compriseactivating the DL BWP and deactivating the active DL BWP.

In an example, a bandwidth part indicator field may be configured in aDCI format (e.g., DCI format 0_1). In an example, a value of thebandwidth part indicator field may indicate an active UL BWP, from asecond set of BWPs, for one or more UL transmissions. In an example, thebandwidth part indicator field may indicate an UL BWP different from theactive UL BWP. In an example, in response to the bandwidth partindicator field indicating the UL BWP different from the active UL BWP,the wireless device may set the UL BWP as a current active UL BWP. In anexample, the setting the UL BWP as a current active UL BWP may compriseactivating the UL BWP and deactivating the active UL BWP.

In an example, a DCI format (e.g., DCI format 1_1) indicating an activeDL BWP change may comprise a time domain resource assignment field. Thetime domain resource assignment field may provide a slot offset valuefor a PDSCH reception. In an example, the slot offset value may besmaller than a delay required by a wireless device for the active DL BWPchange. In an example, in response to the slot offset value beingsmaller than the delay required by the wireless device for the active DLBWP change, the wireless device may not expect to detect the DCI formatindicating the active DL BWP change.

In an example, a DCI format (e.g., DCI format 0_1) indicating an activeUL BWP change may comprise a time domain resource assignment field. Thetime domain resource assignment field may provide a slot offset valuefor a PUSCH transmission. In an example, the slot offset value may besmaller than a delay required by a wireless device for the active UL BWPchange. In an example, in response to the slot offset value beingsmaller than the delay required by the wireless device for the active ULBWP change, the wireless device may not expect to detect the DCI formatindicating the active UL BWP change.

In an example, a wireless device may receive a PDCCH in a slot of ascheduling cell. In an example, the wireless device may detect a DCIformat (e.g., DCI format 1_1), in the PDCCH of the scheduling cell,indicating an active DL BWP change for a serving cell. In an example,the DCI format may comprise a time domain resource assignment field. Thetime domain resource assignment field may provide a slot offset valuefor a PDSCH transmission. In an example, the slot offset value mayindicate a second slot. In an example, in response to the detecting theDCI format indicating the active DL BWP change, the wireless device maynot be required to receive or transmit in the serving cell during a timeduration from the end of a third symbol of the slot until the beginningof the second slot.

In an example, a wireless device may receive a PDCCH in a slot of ascheduling cell. In an example, the wireless device may detect a DCIformat (e.g., DCI format 0_1), in the PDCCH of the scheduling cell,indicating an active UL BWP change for a serving cell. In an example,the DCI format may comprise a time domain resource assignment field. Thetime domain resource assignment field may provide a slot offset valuefor a PUSCH transmission. In an example, the slot offset value mayindicate a second slot. In an example, in response to the detecting theDCI format indicating the active UL BWP change, the wireless device maynot be required to receive or transmit in the serving cell during a timeduration from the end of a third symbol of the slot until the beginningof the second slot.

In an example, a UE may expect to detect a DCI format 0_1 indicatingactive UL BWP change/switch, or a DCI format 1_1 indicating active DLBWP change/switch, when a corresponding PDCCH for the detected DCIformat 0_1 or the detected DCI format 1_1 is received within first 3symbols of a slot. In an example, a UE may not expect to detect a DCIformat 0_1 indicating active UL BWP change/switch, or a DCI format 1_1indicating active DL BWP change/switch, if a corresponding PDCCH isreceived after first 3 symbols of a slot.

In an example, an active DL BWP change may comprise switching from theactive DL BWP of a serving cell to a DL BWP of the serving cell. In anexample, the switching from the active DL BWP to the DL BWP may comprisesetting the DL BWP as a current active DL BWP and deactivating theactive DL BWP.

In an example, an active UL BWP change may comprise switching from theactive UL BWP of a serving cell to a UL BWP of the serving cell. In anexample, the switching from the active UL BWP to the UL BWP may comprisesetting the UL BWP as a current active UL BWP and deactivating theactive UL BWP.

In an example, for a serving cell (e.g., PCell, SCell), a base stationmay provide a wireless device with a higher layer parameterdefaultDownlinkBWP-Id. In an example, the higher layer parameterdefaultDownlinkBWP-Id may indicate a default DL BWP among the first setof (configured) BWPs of the serving cell.

In an example, a base station may not provide a wireless device with ahigher layer parameter defaultDownlinkBWP-Id. In response to not beingprovided by the higher layer parameter defaultDownlinkBWP-Id, thewireless device may set the initial active DL BWP as a default DL BWP.In an example, in response to not being provided by the higher layerparameter defaultDownlinkBWP-Id, the default DL BWP may be the initialactive DL BWP.

In an example, a base station may provide a wireless device with ahigher layer parameter BWP-InactivityTimer. In an example, the higherlayer parameter BWP-InactivityTimer may indicate a BWP inactivity timerwith a timer value for a serving cell (e.g., primary cell, secondarycell). In an example, when provided with the higher layer parameterBWP-InactivityTimer and the BWP inactivity timer is running, thewireless device may decrement the BWP inactivity timer at the end of asubframe for frequency range 1 (e.g., FR1, sub-6 GHz) or at the end of ahalf subframe for frequency range 2 (e.g., FR2, millimeter-waves) inresponse to not restarting the BWP inactivity timer during an intervalof the subframe for the frequency range 1 or an interval of the halfsubframe for the frequency range 2.

In an example, a wireless device may perform an active DL BWP change fora serving cell in response to an expiry of a BWP inactivity timerassociated with the serving cell. In an example, the wireless device maynot be required to receive or transmit in the serving cell during a timeduration from the beginning of a subframe for frequency range 1 or ofhalf of a subframe for frequency range 2. The time duration may start/beimmediately after the expiry of the BWP inactivity timer and may lastuntil the beginning of a slot where the wireless device can receiveand/or transmit.

In an example, a base station may provide a wireless device with ahigher layer parameter firstActiveDownlinkBWP-Id of a serving cell(e.g., secondary cell). In an example, the higher layer parameterfirstActiveDownlinkBWP-Id may indicate a DL BWP on the serving cell(e.g., secondary cell). In an example, in response to the being providedby the higher layer parameter firstActiveDownlinkBWP-Id, the wirelessdevice may use the DL BWP as a first active DL BWP on the serving cell.

In an example, a base station may provide a wireless device with ahigher layer parameter firstActiveUplinkBWP-Id on a carrier (e.g., SUL,NUL) of a serving cell (e.g., secondary cell). In an example, the higherlayer parameter firstActiveUplinkBWP-Id may indicate an UL BWP. In anexample, in response to the being provided by the higher layer parameterfirstActiveUplinkBWP-Id, the wireless device may use the UL BWP as afirst active UL BWP on the carrier of the serving cell.

In an example, for paired spectrum operation, a UE may not expect totransmit a PUCCH with HARQ-ACK information on a PUCCH resource indicatedby a DCI format 1_0 or a DCI format 1_1 if the UE changes its active ULBWP on a primary cell between a time of a detection of the DCI format1_0 or the DCI format 1_1 and a time of a corresponding PUCCHtransmission with the HARQ-ACK information.

In an example, a UE may not monitor PDCCH when the UE performs RRMmeasurements over a bandwidth that is not within the active DL BWP forthe UE.

In an example, a DL BWP index (ID) may be an identifier for a DL BWP.One or more parameters in an RRC configuration may use the DL BWP-ID toassociate the one or more parameters with the DL BWP. In an example, theDL BWP ID=0 may be associated with the initial DL BWP.

In an example, an UL BWP index (ID) may be an identifier for an UL BWP.One or more parameters in an RRC configuration may use the UL BWP-ID toassociate the one or more parameters with the UL BWP. In an example, theUL BWP ID=0 may be associated with the initial UL BWP.

If a higher layer parameter firstActiveDownlinkBWP-Id is configured foran SpCell, a higher layer parameter firstActiveDownlinkBWP-Id indicatesan ID of a DL BWP to be activated upon performing the reconfiguration.

If a higher layer parameter firstActiveDownlinkBWP-Id is configured foran SCell, a higher layer parameter firstActiveDownlinkBWP-Id indicatesan ID of a DL BWP to be used upon MAC-activation of the SCell.

If a higher layer parameter firstActiveUplinkBWP-Id is configured for anSpCell, a higher layer parameter firstActiveUplinkBWP-Id indicates an IDof an UL BWP to be activated upon performing the reconfiguration.

If a higher layer parameter firstActiveUplinkBWP-Id is configured for anSCell, a higher layer parameter firstActiveUplinkBWP-Id indicates an IDof an UL BWP to be used upon MAC-activation of the SCell.

In an example, a wireless device, to execute a reconfiguration withsync, may consider an uplink BWP indicated in a higher layer parameterfirstActiveUplinkBWP-Id to be an active uplink BWP.

In an example, a wireless device, to execute a reconfiguration withsync, may consider a downlink BWP indicated in a higher layer parameterfirstActiveDownlinkBWP-Id to be an active downlink BWP.

FIG. 18 shows an example of a BWP operation as per an aspect of anembodiment of the present disclosure.

In an example, a wireless device may receive, from a base station, oneor more configuration parameters for one or more cells. The one or morecells may comprise a first cell (e.g., PCell, SCell) and a second cell(e.g., PCell, SCell).

In an example, the one or more configuration parameters may indicatecell-specific indices (e.g., provided by a higher layer parameterservCellIndex) for the one or more cells. In an example, each cell ofthe one or more cells may be identified by a respective onecell-specific index of the cell-specific indices. In an example, thefirst cell (e.g., First cell in FIG. 18) may be identified by a firstcell-specific index. In an example, the second cell (e.g., Second cellin FIG. 18) may be identified by a second cell-specific index.

In an example, the first cell and the second cell may be the same. In anexample, the first cell and the second cell being the same may comprisethat the first cell-specific index of the first cell and the secondcell-specific index of the second cell may be the same.

In an example, the first cell and the second cell may be different. Inan example, the first cell and the second cell being different maycomprise that the first cell-specific index of the first cell and thesecond cell-specific index of the second cell may be different.

In an example, a base station may configure a wireless device with oneor more first BWPs for a first cell. In an example, the one or morefirst BWPs may comprise one or more first UL BWPs. In an example, theone or more first BWPs may comprise one or more first DL BWPs.

In an example, the base station may configure the wireless device withone or more second BWPs for the second cell. In an example, the one ormore second BWPs may comprise one or more second UL BWPs. In an example,the one or more second BWPs may comprise one or more second DL BWPs.

In an example, the wireless device may operate on a first BWP (e.g., ULBWP, DL BWP) of the one or more first BWPs of the first cell. In anexample, the operating on the first BWP may comprise setting the firstBWP as a first active BWP of the first cell. In an example, the wirelessdevice may initiate/trigger a first BWP switching for the first cell (attime T0 in FIG. 18). In an example, the first BWP switching may compriseswitching from the first BWP to a second BWP (e.g., UL BWP, DL BWP) ofthe one or more first BWPs of the first cell. In an example, theswitching from the first BWP to the second BWP may comprise activatingthe second BWP. In an example, the switching from the first BWP to thesecond BWP may comprise deactivating the first BWP (or the first activeBWP of the first cell). In an example, the switching from the first BWPto the second BWP may comprise setting the second BWP as a second activeBWP of the first cell.

In an example, the one or more configuration parameters may furthercomprise BWP specific indices for the one or more first BWPs of thefirst cell. In an example, each BWP of the one or more first BWPs may beidentified by a respective one BWP specific index of the BWP specificindices (e.g., provided by a higher layer parameter bwp-ID in the one ormore configuration parameters).

In an example, the first BWP may be identified by a first BWP specificindex. The second BWP may be identified by a second BWP specific index.

In an example, the wireless device may initiate/trigger the first BWPswitching in response to receiving a DCI (e.g., DCI format 1_1, DCIformat 0_1) on a PDCCH on/for the first cell. In an example, a bandwidthpart indicator field may be present/configured in the DCI. In anexample, the PDCCH may indicate a downlink assignment or an uplinkgrant. In an example, the bandwidth part indicator field may indicatethe second BWP. In an example, a value of the bandwidth part indicatorfield may be equal to the second BWP specific index. In an example, thesecond BWP may be different from the first BWP. In an example, thesecond BWP being different from the first BWP may comprise that thefirst BWP specific index of the first BWP may be different from thesecond BWP specific index of the second BWP. In an example, in responseto the bandwidth part indicator field indicating the second BWPdifferent from the first BWP, the wireless device may switch from thefirst BWP to the second BWP. In an example, the wireless device may setthe second BWP as the second active BWP of the first cell.

In an example, the first BWP may be a first DL BWP of the one or morefirst DL BWPs and the second BWP may be a second DL BWP of the one ormore first DL BWPs.

In an example, the first BWP may be a first UL BWP of the one or morefirst UL BWPs and the second BWP may be a second UL BWP of the one ormore first UL BWPs.

In an example, the setting the second BWP as the second active BWP ofthe first cell may comprise activating the second BWP and deactivatingthe first active BWP (e.g., the first BWP) of the first cell.

In an example, the base station may configure the wireless device with afirst BWP inactivity timer for the first cell. In an example, the firstBWP inactivity timer may expire. In an example, the wireless device mayinitiate/trigger the first BWP switching in response to the first BWPinactivity timer expiring.

In an example, the second BWP may a default BWP (e.g., default downlinkBWP) of the first cell. In an example, the second BWP being the defaultBWP may comprise that the second BWP may be indicated by a default DLBWP ID (e.g., via one or more configuration parameters includingdefaultDownlinkBWP-Id parameter) for the first cell. In an example, thesecond BWP being indicated by the default DL BWP ID may comprise thatthe second BWP specific index and the default DL BWP ID may be the same.In an example, the first BWP may be different from the second BWP. In anexample, the first BWP specific index and the default DL BWP ID may bedifferent. In an example, when the wireless device initiates/triggersthe first BWP switching in response to the first BWP inactivity timerexpiring, the wireless device may switch from the first BWP to thesecond BWP in response to the second BWP being the default BWP of thefirst cell.

In an example, the base station may not configure the wireless devicewith a default DL BWP ID (e.g., via one or more configuration parametersincluding defaultDownlinkBWP-Id parameter) for the first cell. In anexample, the second BWP may be an initial BWP (e.g., initial downlinkBWP) of the first cell. In an example, the second BWP being the initialBWP may comprise that the second BWP may be indicated by a higher layerparameter initial downlink BWP (e.g., via the one or more configurationparameters including initialDownlinkBWP parameter) for the first cell.In an example, the first BWP may be different from the second BWP. In anexample, the first BWP may be different from the initial BWP. In anexample, when the wireless device initiates/triggers the first BWPswitching in response to the first BWP inactivity timer expiring andwhen the base station does not configure the default DL BWP ID for thefirst cell, the wireless device may switch from the first BWP to thesecond BWP in response to the second BWP being the initial BWP of thefirst cell.

In an example, the wireless device may initiate a random-accessprocedure (e.g., contention-based random-access procedure,contention-free random-access procedure) for the first cell. In anexample, when the wireless device initiates the random-access procedure,the first BWP may be a first active DL BWP of the first cell. In anexample, when the wireless device initiates the random-access procedure,a third BWP of the one or more first UL BWPs of the first cell may be afirst active UL BWP of the first cell.

In an example, the third BWP may be identified by a third BWP specificindex (e.g., bwp-Id configured by the one or more configurationparameters). In an example, the third BWP specific index and the firstBWP specific index of the first BWP may be different. In an example, thesecond BWP specific index of the second BWP and the third BWP specificindex may be the same. In an example, the first cell may be a SpCell(e.g., PCell). In an example, when the wireless device initiates therandom-access procedure for the first cell, in response to the third BWPspecific index being different from the first BWP specific index, thewireless device may initiate/trigger the first BWP switching. In anexample, the initiating/triggering the first BWP switching may comprisethat the wireless device may switch from the first BWP to the second BWPin response to the second BWP specific index and the third BWP specificindex being the same.

In an example, the wireless device may initiate/trigger the first BWPswitching in response to receiving an RRC signaling.

In an example, the RRC signaling may be an RRC reconfiguration of afirstActiveDownlinkBWP-Id (e.g., included in the RRC signaling) for thefirst cell. In an example, the firstActiveDownlinkBWP-Id may indicatethe second BWP. In an example, the firstActiveDownlinkBWP-Id indicatingthe second BWP may comprise that the firstActiveDownlinkBWP-Id and thesecond BWP specific index may be the same. In an example, when thewireless device initiates/triggers the first BWP switching in responseto receiving the RRC signaling, the wireless device may switch from thefirst BWP to the second BWP in response to the firstActiveDownlinkBWP-Idindicating the second BWP.

In an example, the RRC signaling may be an RRC reconfiguration of afirstActiveUplinkBWP-Id (e.g., included in the RRC signaling) for thefirst cell. In an example, the firstActiveUplinkBWP-Id may indicate thesecond BWP. In an example, the firstActiveUplinkBWP-Id indicating thesecond BWP may comprise that the firstActiveUplinkBWP-Id and the secondBWP specific index may be the same. In an example, when the wirelessdevice initiates/triggers the first BWP switching in response toreceiving the RRC signaling, the wireless device may switch from thefirst BWP to the second BWP in response to the firstActiveUplinkBWP-Idindicating the second BWP.

In an example, the wireless device may complete the first BWP switchingat time T1 in FIG. 18. In an example, a first BWP switching delay of thewireless device may be T1-T0 (e.g., symbols, msec, slots). In anexample, the first BWP switching delay may be a time duration tocomplete the first BWP switching. In an example, in the time duration,the wireless device may switch from the first BWP to the second BWP (inthe first BWP switching delay). In an example, the first BWP switchingdelay for the wireless device may be based on at least one of: a firstfrequency/band of the first BWP, a first subcarrier spacing of the firstBWP, a second frequency/band of the second BWP, a second subcarrierspacing of the second BWP. In an example, the first BWP switching delayfor the wireless device may be based on an event (e.g., the DCI, the RRCsignaling, initiating the random-access procedure, an expiry of thefirst BWP inactivity timer) triggering/initiating the first BWPswitching. In an example, the first BWP switching delay for the wirelessdevice may be based on UE capability.

In an example, the wireless device may operate on a fourth BWP (e.g., ULBWP, DL BWP) of the one or more second BWPs of the second cell. In anexample, the operating on the fourth BWP may comprise setting the fourthBWP as a first active BWP of the second cell. In an example, thewireless device may initiate/trigger a second BWP switching for thesecond cell (at time T2 in FIG. 18). In an example, the second BWPswitching may comprise switching from the fourth BWP to a fifth BWP(e.g., UL BWP, DL BWP) of the one or more second BWPs of the secondcell. In an example, the switching from the fourth BWP to the fifth BWPmay comprise activating the fifth BWP. In an example, the switching fromthe fourth BWP to the fifth BWP may comprise deactivating the fourth BWP(or the first active BWP of the second cell). In an example, theswitching from the fourth BWP to the fifth BWP may comprise setting thefifth BWP as a second active BWP of the second cell.

In an example, the one or more configuration parameters may furthercomprise BWP specific indices for the one or more second BWPs of thesecond cell. In an example, each BWP of the one or more second BWPs maybe identified by a respective one BWP specific index of the BWP specificindices (e.g., provided by a higher layer parameter bwp-ID in the one ormore configuration parameters).

In an example, the fourth BWP may be identified by a fourth BWP specificindex. The fifth BWP may be identified by a fifth BWP specific index.

In an example, the wireless device may initiate/trigger the second BWPswitching in response to receiving a second DCI (e.g., DCI format 1_1,DCI format 0_1) on a second PDCCH on/for the second cell. In an example,a bandwidth part indicator field may be present/configured in the secondDCI. In an example, the second PDCCH may indicate a downlink assignmentor an uplink grant. In an example, the bandwidth part indicator fieldmay indicate the fifth BWP. In an example, a value of the bandwidth partindicator field may be equal to the fifth BWP specific index. In anexample, the fifth BWP may be different from the fourth BWP. In anexample, the fifth BWP being different from the fourth BWP may comprisethat the fourth BWP specific index of the fourth BWP may be differentfrom the fifth BWP specific index of the fifth BWP. In an example, inresponse to the bandwidth part indicator field indicating the fifth BWPdifferent from the fourth BWP, the wireless device may switch from thefourth BWP to the fifth BWP. In an example, the wireless device may setthe fifth BWP as the second active BWP of the second cell.

In an example, the fourth BWP may be a first DL BWP of the one or moresecond DL BWPs and the fifth BWP may be a second DL BWP of the one ormore second DL BWPs.

In an example, the fourth BWP may be a first UL BWP of the one or moresecond UL BWPs and the fifth BWP may be a second UL BWP of the one ormore second UL BWPs.

In an example, the setting the fifth BWP as the second active BWP of thesecond cell may comprise activating the fifth BWP and deactivating thefirst active BWP (e.g., the fourth BWP) of the second cell.

In an example, the base station may configure the wireless device with asecond BWP inactivity timer for the second cell. In an example, thesecond BWP inactivity timer may expire. In an example, the wirelessdevice may initiate/trigger the second BWP switching in response to thesecond BWP inactivity timer expiring.

In an example, the fifth BWP may a default BWP (e.g., default downlinkBWP) of the second cell. In an example, the fifth BWP being the defaultBWP may comprise that the fifth BWP may be indicated by a default DL BWPID (e.g., via one or more configuration parameters includingdefaultDownlinkBWP-Id parameter) for the second cell. In an example, thefifth BWP being indicated by the default DL BWP ID may comprise that thefifth BWP specific index and the default DL BWP ID may be the same. Inan example, the fourth BWP may be different from the fifth BWP. In anexample, the fourth BWP specific index and the default DL BWP ID may bedifferent. In an example, when the wireless device initiates/triggersthe second BWP switching in response to the second BWP inactivity timerexpiring, the wireless device may switch from the fourth BWP to thefifth BWP in response to the fifth BWP being the default BWP of thesecond cell.

In an example, the base station may not configure the wireless devicewith a default DL BWP ID (e.g., via one or more configuration parametersincluding defaultDownlinkBWP-Id parameter) for the second cell. In anexample, the fifth BWP may be an initial BWP (e.g., initial downlinkBWP) of the second cell. In an example, the fifth BWP being the initialBWP may comprise that the fifth BWP may be indicated by a higher layerparameter initial downlink BWP (e.g., via the one or more configurationparameters including initialDownlinkBWP parameter) for the second cell.In an example, the fourth BWP may be different from the fifth BWP. In anexample, the fourth BWP may be different from the initial BWP. In anexample, when the wireless device initiates/triggers the second BWPswitching in response to the second BWP inactivity timer expiring andwhen the base station does not configure the default DL BWP ID for thesecond cell, the wireless device may switch from the fourth BWP to thefifth BWP in response to the fifth BWP being the initial BWP of thesecond cell.

In an example, the wireless device may initiate a second random-accessprocedure (e.g., contention-based random-access procedure,contention-free random-access procedure) for the second cell. In anexample, when the wireless device initiates the second random-accessprocedure, the fourth BWP may be a first active DL BWP of the secondcell. In an example, when the wireless device initiates therandom-access procedure, a sixth BWP of the one or more second UL BWPsof the second cell may be a first active UL BWP of the second cell.

In an example, the sixth BWP may be identified by a sixth BWP specificindex (e.g., bwp-Id configured by the one or more configurationparameters). In an example, the sixth BWP specific index and the fourthBWP specific index of the fourth BWP may be different. In an example,the fifth BWP specific index of the fifth BWP and the sixth BWP specificindex may be the same. In an example, the second cell may be a SpCell(e.g., PCell). In an example, when the wireless device initiates thesecond random-access procedure for the second cell, in response to thesixth BWP specific index being different from the fourth BWP specificindex, the wireless device may initiate/trigger the second BWPswitching. In an example, the initiating/triggering the second BWPswitching may comprise that the wireless device may switch from thefourth BWP to the fifth BWP in response to the fifth BWP specific indexand the sixth BWP specific index being the same.

In an example, the wireless device may initiate/trigger the second BWPswitching in response to receiving a second RRC signaling.

In an example, the second RRC signaling may be an RRC reconfiguration ofa firstActiveDownlinkBWP-Id (e.g., included in the second RRC signaling)for the second cell. In an example, the firstActiveDownlinkBWP-Id mayindicate the fifth BWP. In an example, the firstActiveDownlinkBWP-Idindicating the fifth BWP may comprise that the firstActiveDownlinkBWP-Idand the fifth BWP specific index may be the same. In an example, whenthe wireless device initiates/triggers the second BWP switching inresponse to receiving the second RRC signaling, the wireless device mayswitch from the fourth BWP to the fifth BWP in response to thefirstActiveDownlinkBWP-Id indicating the fifth BWP.

In an example, the second RRC signaling may be an RRC reconfiguration ofa firstActiveUplinkBWP-Id (e.g., included in the second RRC signaling)for the second cell. In an example, the firstActiveUplinkBWP-Id mayindicate the fifth BWP. In an example, the firstActiveUplinkBWP-Idindicating the fifth BWP may comprise that the firstActiveUplinkBWP-Idand the fifth BWP specific index may be the same. In an example, whenthe wireless device initiates/triggers the second BWP switching inresponse to receiving the second RRC signaling, the wireless device mayswitch from the fourth BWP to the fifth BWP in response to thefirstActiveUplinkBWP-Id indicating the fifth BWP.

In an example, the wireless device may complete the second BWP switchingat time T3 in FIG. 18. In an example, a second BWP switching delay ofthe wireless device may be T3-T2 (e.g., symbols, msec, slots). In anexample, the second BWP switching delay may be a second time duration tocomplete the second BWP switching. In an example, in the second timeduration, the wireless device may switch from the fourth BWP to thefifth BWP (in the second BWP switching delay). In an example, the secondBWP switching delay for the wireless device may be based on at least oneof: a first frequency/band of the fourth BWP, a first subcarrier spacingof the fourth BWP, a second frequency/band of the fifth BWP, a secondsubcarrier spacing of the fifth BWP. In an example, the second BWPswitching delay for the wireless device may be based on an event (e.g.,the second DCI, the second RRC signaling, initiating the secondrandom-access procedure, an expiry of the second BWP inactivity timer)triggering/initiating the second BWP switching. In an example, thesecond BWP switching delay for the wireless device may be based on UEcapability.

In an example, the wireless device may determine that the first BWPswitching delay of the first cell and the second BWP switching delay ofthe second cell overlap in a time domain (e.g., between T2 and T1 inFIG. 18). In an example, the time domain may be at least one symbol(e.g., OFDM symbol). In an example, the time domain may be at least oneslot. In an example, the time domain may be at least one subframe. In anexample, the time domain may be at least one half-subframe.

In an example, the wireless device may determine that the first BWPswitching of the first cell and the second BWP switching of the secondcell overlap in a time domain (e.g., between T2 and T1 in FIG. 18). Inan example, the time domain may be at least one symbol (e.g., OFDMsymbol). In an example, the time domain may be at least one slot. In anexample, the time domain may be at least one subframe. In an example,the time domain may be at least one half-subframe.

In an example, the wireless device may initiate the first BWP switchingof the first cell earlier in time than the second BWP switching of thesecond cell (e.g., T0<T2 in FIG. 18).

In an example, in response to the determining (the overlapping in thetime domain) and the initiating the first BWP switching earlier in timethan the second BWP switching, the wireless device may complete thefirst BWP switching when the wireless device completes the second BWPswitching (e.g., T3 in FIG. 18).

In an example, the wireless device may complete the first BWP switchingin a first completion time (e.g., time T1 in FIG. 18). In an example,the wireless device may complete the second BWP switching in a secondcompletion time (e.g., time T3 in FIG. 18).

In an example, in response to the determining (the overlapping in thetime domain) and the initiating the first BWP switching earlier in timethan the second BWP switching, the wireless device may extend the firstcompletion time (e.g., T1 in FIG. 18) of the first BWP switching to thesecond completion time (e.g., T3 in FIG. 18).

In an example, in response to the determining (the overlapping in thetime domain) and the initiating the first BWP switching earlier in timethan the second BWP switching, the wireless device may extend the firstBWP switching delay of the first BWP switching by an extended first BWPswitching delay (e.g., Extended first BWP switching delay in FIG. 18).In FIG. 18, the extended first BWP switching delay may comprise a timedifference between the second completion time (e.g., T3 in FIG. 18) andthe first completion time (e.g., T1 in FIG. 18).

In an example, the wireless device may process one or more first (RF)settings (e.g., bandwidth, frequency location change) in response to theinitiating/triggering the first BWP switching for the first cell. In anexample, when the wireless device initiates/triggers the second BWPswitching (requiring bandwidth and/or frequency location change) for thesecond cell, the second BWP switching (e.g., occurring later in time)may trigger reprocessing of the one or more first (RF) settings for anRF setting update. In an example, for the reprocessing of the one ormore first (RF) settings for the RF setting update, the wireless devicemay consider RF settings of the first cell and the second cell (e.g., orall activated cells of the one or more cells). When the first BWPswitching of the first cell and the second BWP switching of the secondcell overlap in time domain, in response to the reprocessing the one ormore first (RF) settings, the wireless device may extend the first BWPswitching delay of the first BWP switching by the extended first BWPswitching delay

In an example, the determining (the overlapping in the time domain) andthe initiating the first BWP switching earlier in time than the secondBWP switching may result in an extended first BWP switching delay of thefirst BWP switching.

In an example, when the wireless device initiates/triggers the secondBWP switching for the second cell, the wireless device may determinethat the first BWP switching of the first cell is ongoing. In anexample, a starting time of the second BWP switching (e.g., time T2 inFIG. 18) may fall in the first BWP switching delay of the first BWPswitching (e.g., between T0 and T1 in FIG. 18). In response to thestarting time of the second BWP switching falling in the first BWPswitching delay of the first BWP switching, the wireless device mayextend the first completion time (e.g., T1 in FIG. 18) of the first BWPswitching to the second completion time (e.g., T3 in FIG. 18). In anexample, the extending the first completion time of the first cell mayresult in a longer switching delay of the first BWP switching (e.g., byan extended first BWP switching delay). In an example, the extending thefirst completion time may result in an interruption of a datatransmission (e.g., uplink, downlink data transmission) for the firstcell. In an example, the interruption may comprise missing a downlinkdata packet (e.g., PDSCH). In an example, the downlink data packet maybe scheduled by the DCI triggering the first BWP switching. In anexample, the wireless device may not transmit an acknowledgement (ACK)for the downlink data packet in response to the missing the downlinkdata packet. This would increase the latency of the data transmission.In an example, the interruption may comprise missing a time/frequencyresource provided by an uplink grant (provided by the DCI triggering thefirst BWP switching) to transmit an uplink data packet (PUSCH).

In an example, simultaneous BWP switching (e.g., the first BWPswitching, the second BWP switching) across cells (e.g., the first cell,the second cell) may be a significant burden from the UE implementationperspective. Example embodiments enhance existing BWP operation toimprove UE implementation for the simultaneous BWP switching acrosscells or same cell (if multiple active BWPs are supported).

FIG. 19 shows an example of a BWP operation as per an aspect of anembodiment of the present disclosure. In an example, the wireless devicemay initiate/trigger the first BWP switching for the first cell at timeT0 in FIG. 19. In an example, the wireless device may complete the firstBWP switching at time T1 in FIG. 19. In an example, the first cell andthe second cell may operate in frequency range 1 (e.g., FR1, sub-6 GHz).In an example, the first cell and the second cell may operate infrequency range 2 (e.g., FR2, millimeter wave, 24 GHz, 30 GHz, 52 GHz).

In an example, the first cell may operate in FR1 and the second cell mayoperate in FR2. In an example, the first cell may operate in FR2 and thesecond cell may operate in FR2.

In an example, the first BWP switching delay (e.g., time durationbetween T0 and T1 in FIG. 19) of the first BWP switching of the firstcell may overlap with a set of slots (e.g., Slot 1, Slot 2, . . . , Slot7 in FIG. 19) of the second cell. In an example, the set of slots may bedetermined, by the base station and or by the wireless device, based ona subcarrier spacing (SCS) of the second cell. In an example, the firstBWP switching delay may overlap with the set of slots (e.g., Slot 1,Slot 2, . . . , Slot 7 in FIG. 19) for the SCS of the second cell.

In an example, the first BWP switching delay may be a time duration(e.g., time duration between T0 and T1 in FIG. 19). In the timeduration, the wireless device may not transmit or receive in the firstcell. In an example, the wireless device may initiate/trigger the firstBWP switching for an active BWP change of the first cell. In an example,the active BWP change may comprise switching from the first BWP to thesecond BWP. In an example, the active BWP change may comprise settingthe second BWP as the second active BWP of the first cell. In anexample, the active BWP change may comprise deactivating the first BWPas the first active BWP of the first cell and activating the second BWPas the second active BWP of the first cell. In an example, in the timeduration, the wireless device may not transmit or receive for the activeBWP change (e.g., active UL BWP change, active DL BWP change) in thefirst cell.

In an example, in response to the first BWP switching delay of the firstcell overlapping with the set of slots, the wireless device does notexpect to detect a second DCI (e.g., DCI format 1_1, DCI format 0_1) forthe second cell in a slot. In an example, the slot may be different froma first slot (e.g., Slot 1) of the set of slots. In an example, the slotmay be Slot 2, Slot 3, Slot 4, Slot 5, Slot 6 or Slot 7 in FIG. 19. Inan example, the first slot may be Slot 1 in FIG. 19. In an example, thesecond DCI may be a DCI format 1_1 indicating an active DL BWP changefor the second cell. In an example, the second DCI may be a DCI format0_1 indicating an active UL BWP change for the second cell.

In an example, in response to the not expecting to detect the second DCIfor the second cell in the slot, the wireless device may not monitor,for the second DCI, a second PDCCH on/for the second cell in the slot.

In an example, when the wireless device receives the second DCI for thesecond cell in the first slot (e.g., Slot 1 in FIG. 19), the first BWPswitching of the first cell and the second BWP switching of the secondcell may be aligned. In response to the alignment, the wireless devicemay initiate/trigger the second BWP switching for the second cell. Thesecond BWP switching may not result in a (long) extended first BWPswitching delay.

In an example, the fourth BWP may be a first UL BWP of the one or moresecond UL BWPs and the fifth BWP may be a second UL BWP of the one ormore second UL BWPs. In an example, the fourth BWP may be a first activeUL BWP of the second cell. In an example, the active UL BWP change maycomprise switching from the fourth BWP to the fifth BWP. In an example,the active UL BWP change may comprise setting the fifth BWP as a secondactive UL BWP of the second cell. In an example, the active UL BWPchange may comprise deactivating the fourth BWP as the first active ULBWP of the second cell and activating the fifth BWP as the second activeUL BWP of the second cell.

In an example, the fourth BWP may be a first DL BWP of the one or moresecond DL BWPs and the fifth BWP may be a second DL BWP of the one ormore second DL BWPs. In an example, the fourth BWP may be a first activeDL BWP of the second cell. In an example, the active DL BWP change maycomprise switching from the fourth BWP to the fifth BWP. In an example,the active DL BWP change may comprise setting the fifth BWP as a secondactive DL BWP of the second cell. In an example, the active DL BWPchange may comprise deactivating the fourth BWP as the first active DLBWP of the second cell and activating the fifth BWP as the second activeDL BWP of the second cell.

FIG. 20 shows an example of a BWP operation as per an aspect of anembodiment of the present disclosure. In an example, the wireless devicemay initiate/trigger the first BWP switching for the first cell at timeT0 in FIG. 20. In an example, the wireless device may complete the firstBWP switching at time T1 in FIG. 20.

In an example, the wireless device may complete the first BWP switchingin a first completion time (e.g., time T1 in FIG. 20). In an example,for FR1, a first subframe (immediately) after the first completion timemay occur in a switching time (e.g., T3 in FIG. 20) of the second cell.In an example, for FR2, a first half a subframe (immediately) after thefirst completion time may occur in a switching time (e.g., T3 in FIG.20) of the second cell.

In an example, the second BWP inactivity timer of the second cell mayexpire at time T2 in FIG. 20. In an example, the wireless device mayinitiate/trigger the second BWP switching in response to the second BWPinactivity timer expiring. In an example, the wireless device maydetermine that the second BWP inactivity timer of the second cellexpires (e.g., T2 in FIG. 20) within the time duration (e.g., the firstBWP switching delay of the first cell between T0 and T1 in FIG. 20). Inan example, the second BWP inactivity timer of the second cell mayexpire (e.g., T2 in FIG. 20) within the time duration (e.g., the firstBWP switching delay of the first cell between T0 and T1 in FIG. 20). Inan example, in response to the second BWP inactivity timer of the secondcell expiring within the time duration, the wireless device may delaythe second BWP switching for the second cell till the switching time(e.g., T3 in FIG. 20).

In an example, in response to the delaying the second BWP switching, thewireless device may start switching from the fourth BWP to the fifth BWP(e.g., the default BWP of the second cell, initial downlink BWP of thesecond cell) at the switching time (e.g., T3 in FIG. 20). In an example,the delaying the second BWP switching may comprise delaying a start timeof the second BWP switching from T2 to T3 in FIG. 20.

FIG. 21 shows an example of a BWP operation as per an aspect of anembodiment of the present disclosure.

In an example, the wireless device may initiate/trigger the first BWPswitching for the first cell at time T0 in FIG. 21. In an example, thewireless device may complete the first BWP switching at time T1 in FIG.21.

In an example, the wireless device may complete the first BWP switchingin a first completion time (e.g., time T1 in FIG. 21). In an example,for FR1, a first subframe (immediately) after the first completion timemay occur in a switching time (e.g., T3 in FIG. 21) of the second cell.In an example, for FR2, a first half a subframe (immediately) after thefirst completion time may occur in a switching time (e.g., T3 in FIG.21) of the second cell.

In an example, the wireless device may initiate the second random-accessprocedure (e.g., contention-based random-access procedure,contention-free random-access procedure) for the second cell at time T2in FIG. 21. In an example, the second cell may be a SpCell (e.g.,PCell). In an example, the wireless device may initiate/trigger thesecond BWP switching for the second random-access procedure (e.g., inresponse to the sixth BWP specific index being different from the fourthBWP specific index). In an example, the wireless device mayinitiate/trigger the second BWP switching for the second random-accessprocedure within the time duration (e.g., the first BWP switching delayof the first cell between T0 and T1 in FIG. 21).

In an example, in response to the initiating/triggering the second BWPswitching for the second random-access procedure of the second cellwithin the time duration, the wireless device may delay the second BWPswitching for the second cell till the switching time (e.g., T3 in FIG.21).

In an example, in response to the delaying the second BWP switching, thewireless device may start switching from the fourth BWP to the fifth BWP(e.g., in response to the fifth BWP specific index and the sixth BWPspecific index being the same) at the switching time (e.g., T3 in FIG.21). In an example, the delaying the second BWP switching may comprisedelaying a start time of the second BWP switching to the switching time(e.g., from T2 to T3 in FIG. 21).

In an example, in response to the initiating/triggering the second BWPswitching for the second random-access procedure of the second cellwithin the time duration, the wireless device may delay the second BWPswitching for the second cell till the first completion time (e.g., T1in FIG. 21).

In an example, in response to the delaying the second BWP switching, thewireless device may start switching from the fourth BWP to the fifth BWP(e.g., in response to the fifth BWP specific index and the sixth BWPspecific index being the same) at the first completion time (e.g., T1 inFIG. 21). In an example, the delaying the second BWP switching maycomprise delaying a start time of the second BWP switching to the firstcompletion time (e.g., from T2 to T1 in FIG. 21).

In an example, the wireless device may initiate/trigger the second BWPswitching for the second random-access procedure in the first slot(e.g., Slot 1 in FIG. 19) of the set of slots. In an example, thewireless device may initiate the second random-access procedure in thefirst slot (e.g., Slot 1 in FIG. 19) of the set of slots. In an example,when the wireless device initiates/triggers the second BWP switching forthe second random-access procedure in the first slot, the first BWPswitching of the first cell and the second BWP switching of the secondcell may be aligned. In response to the alignment, the wireless devicemay perform the second BWP switching for the second cell.

In an example, the wireless device may initiate/trigger the second BWPswitching for the second random-access procedure in a slot of the set ofslots. In an example, the slot may be different from the first slot(e.g., Slot 1 in FIG. 19) of the set of slots. In an example, the slotmay be Slot 2, Slot 3, Slot 4, Slot 5, Slot 6 or Slot 7 in FIG. 19. Inan example, in response to the initiating/triggering the second BWPswitching for the second random-access procedure in the slot differentfrom the first slot, the wireless device may delay the second BWPswitching for the second cell till the switching time (e.g., T3 in FIG.21). In an example, in response to the initiating/triggering the secondBWP switching for the second random-access procedure in the slotdifferent from the first slot, the wireless device may delay the secondBWP switching for the second cell till the first completion time (e.g.,T1 in FIG. 21).

FIG. 22 shows an example of a BWP operation as per an aspect of anembodiment of the present disclosure.

FIG. 24 shows an example flowchart of a BWP operation as per an aspectof embodiments disclosed in FIG. 21 and FIG. 22.

In an example, the wireless device may initiate/trigger the first BWPswitching for the first cell at time T0 in FIG. 22.

In an example, the wireless device may complete the first BWP switchingat time T1 in FIG. 22.

In an example, the wireless device may complete the first BWP switchingin a first completion time (e.g., time T1 in FIG. 22). In an example,for FR1, a first subframe (immediately) after the first completion timemay occur in a switching time (e.g., T3 in FIG. 22) of the second cell.In an example, for FR2, a first half a subframe (immediately) after thefirst completion time may occur in a switching time (e.g., T3 in FIG.22) of the second cell.

In an example, the wireless device may receive the second RRC signalingfor the second cell at time TOO in FIG. 22.

In an example, the wireless device may start processing of the secondRRC signaling at a first time (e.g., TOO in FIG. 22). In an example, thewireless device may complete the processing of the second RRC signalingat a second time (e.g., T2 in FIG. 22). In an example, a processingdelay of the second RRC signaling may be a difference between the secondtime and the first time (e.g., RRC processing delay in FIG. 22, (T2-T00)in FIG. 22).

In an example, the wireless device may initiate/trigger the second BWPswitching in response to receiving the second RRC signaling (e.g., RRCreconfiguration of a firstActiveDownlinkBWP-Id, RRC reconfiguration of afirstActiveUplinkBWP-Id, activation of an SCell, etc.).

In an example, the wireless device may initiate/trigger the second BWPswitching, triggered by the second RRC signaling, for the second cell(e.g., T2 in FIG. 22) within the time duration (e.g., the first BWPswitching delay of the first cell between T0 and T1 in FIG. 22).

In an example, in response to the initiating/triggering the second BWPswitching, triggered by the second RRC signaling, for the second cellwithin the time duration, the wireless device may delay the second BWPswitching for the second cell till the switching time (e.g., T3 in FIG.22).

In an example, in response to the delaying the second BWP switching, thewireless device may start switching from the fourth BWP to the fifth BWP(e.g., in response to the firstActiveDownlinkBWP-Id indicating the fifthBWP, in response to the firstActiveUplinkBWP-Id indicating the fifthBWP) at the switching time (e.g., T3 in FIG. 22). In an example, thedelaying the second BWP switching may comprise delaying a start time ofthe second BWP switching to the switching time (e.g., from T2 to T3 inFIG. 22).

In an example, in response to the initiating/triggering the second BWPswitching, triggered by the second RRC signaling, for the second cellwithin the time duration, the wireless device may delay the second BWPswitching for the second cell till the first completion time (e.g., T1in FIG. 22).

In an example, in response to the delaying the second BWP switching, thewireless device may start switching from the fourth BWP to the fifth BWP(e.g., in response to the firstActiveDownlinkBWP-Id indicating the fifthBWP, in response to the firstActiveUplinkBWP-Id indicating the fifthBWP) at the first completion time (e.g., T1 in FIG. 22). In an example,the delaying the second BWP switching may comprise delaying a start timeof the second BWP switching to the first completion time (e.g., from T2to T1 in FIG. 22).

In an example, the wireless device may complete the processing of thesecond RRC signaling for the second cell in the first slot (e.g., Slot 1in FIG. 19) of the set of slots. In an example, when the wireless devicecompletes the processing of the second RRC signaling in the first slot(e.g., Slot 1 in FIG. 19), the first BWP switching of the first cell andthe second BWP switching of the second cell may be aligned. In responseto the alignment, the wireless device may perform the second BWPswitching for the second cell.

In an example, the wireless device may initiate/trigger the second BWPswitching triggered by the second RRC signaling in the first slot (e.g.,Slot 1 in FIG. 19) of the set of slots. In an example, when the wirelessdevice performs the second BWP switching triggered by the second RRCsignaling in the first slot (e.g., Slot 1 in FIG. 19), the first BWPswitching of the first cell and the second BWP switching of the secondcell may be aligned. In response to the alignment, the wireless devicemay perform the second BWP switching for the second cell.

In an example, the wireless device may complete the processing of thesecond RRC signaling in a slot of the set of slots. In an example, theslot may be different from the first slot (e.g., Slot 1) of the set ofslots. In an example, the slot may be Slot 2, Slot 3, Slot 4, Slot 5,Slot 6 or Slot 7 in FIG. 19. In an example, in response to thecompleting the processing of the second RRC signaling in the slotdifferent from the first slot, the wireless device may delay the secondBWP switching for the second cell till the switching time (e.g., T3 inFIG. 22). In an example, in response to the completing the processing ofthe second RRC signaling in the slot different from the first slot, thewireless device may delay the second BWP switching for the second celltill the first completion time (e.g., T1 in FIG. 22).

In an example, the wireless device may initiate/trigger the second BWPswitching triggered by the second RRC signaling in a slot of the set ofslots. In an example, the slot may be different from the first slot(e.g., Slot 1) of the set of slots. In an example, the slot may be Slot2, Slot 3, Slot 4, Slot 5, Slot 6 or Slot 7 in FIG. 19. In an example,in response to the initiating/triggering the second BWP switchingtriggered by the second RRC signaling in the slot different from thefirst slot, the wireless device may delay the second BWP switching forthe second cell till the switching time (e.g., T3 in FIG. 22). In anexample, in response to the initiating/triggering the second BWPswitching triggered by the second RRC signaling in the slot differentfrom the first slot, the wireless device may delay the second BWPswitching for the second cell till the first completion time (e.g., T1in FIG. 22).

FIG. 23 shows an example of a BWP operation as per an aspect of anembodiment of the present disclosure. FIG. 25 shows an example flowchartof a BWP operation as per an aspect of an embodiment disclosed in FIG.23.

In an example, the wireless device may initiate/trigger the first BWPswitching for the first cell at time T0 in FIG. 23. In an example, thewireless device may complete the first BWP switching at time T1 in FIG.23.

In an example, the wireless device may complete the first BWP switchingin a first completion time (e.g., time T1 in FIG. 23). In an example,for FR1, a first subframe (immediately) after the first completion timemay occur in a switching time (e.g., T3 in FIG. 23) of the second cell.In an example, for FR2, a first half a subframe (immediately) after thefirst completion time may occur in a switching time (e.g., T3 in FIG.23) of the second cell.

In an example, the wireless device may initiate/trigger the second BWPswitching for the second cell at time T2 in FIG. 23. In an example, thesecond BWP switching may be triggered in response to receiving thesecond RRC signaling. In an example, the second BWP switching may betriggered in response to initiating the second random-access procedure.In an example, the second BWP switching may be triggered in response tothe second BWP inactivity timer expiring. In an example, the second BWPswitching may be triggered in response to the receiving the second DCI.

In an example, the wireless device may delay the second BWP switchingfor the second cell till the first completion time (e.g., T1 in FIG.23). In an example, in response to the delaying the second BWPswitching, the wireless device may start switching from the fourth BWPto the fifth BWP at the first completion time.

In an example, the wireless device may delay the second BWP switchingfor the second cell till the switching time (e.g., T3 in FIG. 23). In anexample, in response to the delaying the second BWP switching, thewireless device may start switching from the fourth BWP to the fifth BWPat the switching time.

In an example, in response to the delaying the second BWP switching(e.g., at time T2 in FIG. 23), the wireless device may assume the fourthBWP (e.g., the first active BWP of the second cell) of the second cellas deactivated.

In an example, assuming the fourth BWP of the second cell as deactivatedmay comprise not performing at least one of: transmitting on UL-SCH onthe fourth BWP; transmitting on RACH on the fourth BWP; monitoring aPDCCH on the fourth BWP; transmitting PUCCH on the fourth BWP; reportingCSI for the fourth BWP; transmitting SRS on the fourth BWP, receivingDL-SCH on the fourth BWP. In an example, assuming the fourth BWP asdeactivated may comprise clearing one or more configured downlinkassignments and/or one or more configured uplink grants of configuredgrant Type 2 on the fourth BWP. In an example, assuming the fourth BWPas deactivated may comprise suspending one or more configured uplinkgrants of configured Type 1 on the fourth BWP.

In an example, assuming the fourth BWP as deactivated may comprisestopping at least one of: transmitting on UL-SCH on the fourth BWP;transmitting on RACH on the fourth BWP; monitoring a PDCCH on the fourthBWP; transmitting PUCCH on the fourth BWP; reporting CSI for the fourthBWP; transmitting SRS on the fourth BWP, receiving DL-SCH on the fourthBWP.

In an example, the wireless device may determine delaying the second BWPswitching for the second cell at a first time (e.g., at time T2 in FIG.23). In an example, in response to the delaying the second BWPswitching, the wireless device may start switching from the fourth BWPto the fifth BWP at a second time. In an example, the second time may bethe switching time (e.g., T3 in FIG. 23). In an example, the second timemay be the first completion time (e.g., T1 in FIG. 23). In an example, asecond time duration may comprise a time duration (e.g., Second BWPswitching delay in FIG. 23) between the second time and the first time(e.g., between T3 and T2 in FIG. 23 or between T1 and T2 in FIG. 23). Inan example, when the wireless device determines delaying the second BWPswitching, the wireless device may delay the second BWP switching by thesecond time duration (e.g., Second BWP switching delay in FIG. 23).

In an example, the wireless device may receive a PDCCH, on/for thefourth BWP (e.g., the first active DL BWP) of the second cell, in thesecond time duration. In an example, the PDCCH may indicate a downlinkassignment or an uplink grant. In an example, the PDCCH may be addressedto C-RNTI. In an example, the PDCCH may be addressed to CS-RNTI. In anexample, in response to the receiving the PDCCH, on/for the fourth BWPof the second cell, in the second time duration, the wireless device maynot start or restart the second BWP inactivity timer of the second cell.In an example, the wireless device may receive the PDCCH when there isno ongoing random-access procedure associated with the second cell.

In an example, the wireless device may transmit a first MAC PDU in aconfigured uplink assignment, on the fourth BWP (e.g., the first activeDL BWP) of the second cell, in the second time duration. In an example,in response to the transmitting the first MAC PDU, on the fourth BWP ofthe second cell, in the second time duration, the wireless device maynot start or restart the second BWP inactivity timer of the second cell.In an example, the wireless device may transmit the first MAC PDU whenthere is no ongoing random-access procedure associated with the secondcell.

In an example, the wireless device may receive a second MAC PDU in aconfigured downlink assignment, on the fourth BWP (e.g., the firstactive DL BWP) of the second cell, in the second time duration. In anexample, in response to the receiving the second MAC PDU, on the fourthBWP of the second cell, in the second time duration, the wireless devicemay not start or restart the second BWP inactivity timer of the secondcell. In an example, the wireless device may receive the second MAC PDUwhen there is no ongoing random-access procedure associated with thesecond cell.

FIG. 26 shows an example flowchart of a BWP operation as per an aspectof an embodiment of the present disclosure, where the wireless devicedoes not start or restart the second BWP inactivity timer.

In an example, in response to the receiving the PDCCH, on/for the fourthBWP of the second cell, in the second time duration, the wireless devicemay start or restart the second BWP inactivity timer of the second cell.In an example, in response to the starting or the restarting the secondBWP inactivity timer, the wireless device may cancel the delaying thesecond BWP switching for the second cell. In an example, the cancellingthe delaying the second BWP switching may comprise not startingswitching from the fourth BWP to the fifth BWP at the second time (e.g.,the first completion time T1 in FIG. 23, the switching time T3 in FIG.23). In an example, the cancelling the delaying the second BWP switchingmay comprise refraining from switching from the fourth BWP to the fifthBWP at the second time (e.g., the first completion time T1 in FIG. 23,the switching time T3 in FIG. 23). In an example, the cancelling thedelaying the second BWP switching may comprise, at the second time, thewireless device may keep operating on the fourth BWP (e.g., the firstactive BWP of the second cell) of the second cell. In an example, thecancelling the delaying the second BWP switching may comprise, at thesecond time, the wireless device may keep the fourth BWP as the firstactive BWP of the second cell.

FIG. 27 shows an example flowchart of a BWP operation as per an aspectof an embodiment of the present disclosure, where the wireless devicecancels delaying the second BWP switching.

In an example, a wireless device may receive, from a base station, oneor more messages. The one or more messages may comprise one or moreconfiguration parameters of a plurality of cells. In an example, theplurality of cells may comprise a first cell and a second cell.

In an example, the wireless device may initiate a second random-accessprocedure for the second cell. In an example, in response to theinitiating the second random access-procedure, the wireless device mayinitiate/trigger a second BWP switching for a first active BWP (e.g.,the fourth BWP) of the second cell. In an example, the first active BWPmay be a downlink BWP of the second cell.

In an example, the wireless device may initiate/trigger a first BWPswitching of a second active BWP (e.g., the first BWP) of the firstcell. In an example, the wireless device may determine that theinitiating/triggering the second BWP switching occurs in a time duration(e.g., the first BWP switching delay in FIG. 21) of the first BWPswitching.

In an example, the wireless device may delay, in response to thedetermining, the second BWP switching of the first active BWP until thefirst BWP switching of the second active BWP is completed.

In an example, a wireless device may receive, from a base station, oneor more messages. The one or more messages may comprise one or moreconfiguration parameters of a plurality of cells. In an example, theplurality of cells may comprise a first cell and a second cell.

In an example, the wireless device may receive a second radio resourcecontrol (RRC) signaling for the second cell. In an example, the wirelessdevice may start processing of the second RRC signaling in response tothe receiving the second RRC signaling. In an example, the second RRCsignaling may indicate an active BWP change (e.g., RRC reconfigurationof a firstActiveDownlinkBWP-Id, RRC reconfiguration of afirstActiveUplinkBWP-Id, activation of an SCell, etc.) for the secondcell.

In an example, the wireless device may initiate/trigger a second BWPswitching of a first active BWP (e.g., the fourth BWP) of the secondcell in a slot in response to completing the processing of the secondRRC signaling indicating the active BWP change.

In an example, the wireless device may initiate/trigger a first BWPswitching of a second active BWP (e.g., the first BWP) of the firstcell.

In an example, the wireless device may determine that theinitiating/triggering the second BWP switching for the second celloccurs in a time duration (e.g., the first BWP switching delay in FIG.21) of the first BWP switching of the first cell.

In an example, the wireless device may determine that the slot overlapswith the time duration of the first BWP switching of the first cell.

In an example, the wireless device may delay, in response to thedetermining, the second BWP switching of the first active BWP of thesecond cell until the first BWP switching of the second active BWP ofthe first cell is completed.

In an example, the wireless device may initiate/trigger a first BWPswitching for a second active BWP (e.g., the first BWP) of the firstcell. In an example, the wireless device may start the first BWPswitching in a first time (e.g., time T0 in FIG. 22). In an example, thefirst time may be a slot, a symbol, a subframe or a frame. In anexample, for the first BWP switching, the wireless device may startswitching from the first BWP of the first cell to the second BWP of thefirst cell in the first time. In an example, the wireless device maycomplete the first BWP switching in a second time (e.g., the firstcompletion time, time T1 in FIG. 22). In an example, the second time maybe a second slot, a second symbol, a second subframe or a second frame.In an example, the second time may be the first time plus a first BWPswitching delay for the first BWP switching (e.g., T1=T0+First BWPswitching delay in FIG. 22).

In an example, in response to determining that the first BWP switchingstarting in the first time and completing in the second time, thewireless device may not expect to receive a second RRC signalingtriggering a second BWP switching for a first active BWP (e.g., thefourth BWP) of the second cell between a starting time and an endingtime. In an example, the starting time may be the processing delay plusa second BWP switching delay of the second BWP switching prior/beforethe first time (e.g., T0-(RRC processing delay+Second BWP switchingdelay) in FIG. 22). In an example, the ending time may be the processingdelay prior/before the second time (e.g., (T1-RRC processing delay) inFIG. 22).

In an example, in response to determining that the first BWP switchingstarting in the first time and completing in the second time, the basestation may not transmit a second RRC signaling triggering a second BWPswitching for a first active BWP (e.g., the fourth BWP) of the secondcell between the starting time and the ending time. In an example, inresponse to determining that the first BWP switching starting in thefirst time and completing in the second time, the base station maytransmit the second RRC signaling before the starting time. In anexample, in response to determining that the first BWP switchingstarting in the first time and completing in the second time, the basestation may transmit the second RRC signaling after the ending time.

In an example, the one or more configuration parameters may comprise atimer for the second cell. In an example, the timer may be at least oneof: drx-HARQ-RTT-TimerDL, drx-HARQ-RTT-TimerUL,drx-RetransmissionTimerDL, drx-RetransmissionTimerUL,configuredGrantTimer.

In an example, in response to the delaying the second BWP switching forthe second cell, the wireless device may stop the timer. In an example,the wireless device may restart the timer in response to the startingswitching (e.g., from the fourth BWP to the first BWP) after the delay.In an example, the wireless device may restart the timer in the firstcompletion time (e.g., time T1 in FIG. 23). In an example, the wirelessdevice may restart the timer in the switching time (e.g., time T3 inFIG. 23).

In an example, in response to the delaying the second BWP switching forthe second cell, the wireless device may update a duration of the timer.In an example, the wireless device may increment the duration of thetimer by the second time duration (e.g., Second BWP switching delaybetween T3 and T2 in FIG. 23).

FIG. 28 is a flow diagram as per an aspect of an example embodiment ofthe present disclosure. At 2810, a wireless device may receive one ormore first radio resource control (RRC) messages. The one or more firstRRC messages may comprise one or more configuration parameters of afirst cell and a second cell. At 2820, a second RRC message indicating afirst change of a first active bandwidth part (BWP) of the first cellmay be received. At 2830, the wireless device may complete processing ofthe second RRC message. At 2840, a determination may be made that thecompleting occurs during a time duration of a second change of a secondactive BWP of the second cell. At 2850, based on the determination, thefirst change of the first active BWP may be delayed until the secondchange of the second active BWP is completed.

According to an example embodiment, a wireless device may receive one ormore first radio resource control (RRC) messages. The one or more firstRRC messages may comprise one or more configuration parameters of afirst cell and a second cell. A second RRC message indicating a firstchange of a first active bandwidth part (BWP) of the first cell may bereceived. The wireless device may complete processing of the second RRCmessage. A determination may be made that the completing occurs during atime duration of a second change of a second active BWP of the secondcell. Based on the determination, the first change of the first activeBWP may be delayed until the second change of the second active BWP iscompleted.

According to an example embodiment, the wireless device may not receive,for the second change of the second active BWP, in the second cellwithin the time duration. According to an example embodiment, thewireless device may not transmit, for the second change of the secondactive BWP, in the second cell within the time duration.

According to an example embodiment, the second change of the secondactive BWP may be completed in a completion time. According to anexample embodiment, the wireless device may start, at the completiontime a configured grant timer. According to an example embodiment, thewireless device may start, at the completion time, adrx-HARQ-RTT-TimerDL. According to an example embodiment, the wirelessdevice may start, at the completion time, a drx-HARQ-RTT-TimerUL.According to an example embodiment, the wireless device may start, atthe completion time, a drx-RetransmissionTimerDL. According to anexample embodiment, the wireless device may start, at the completiontime, a drx-RetransmissionTimerUL. According to an example embodiment,the wireless device may increment, based on the delaying, a configuredgrant timer. According to an example embodiment, the wireless device mayincrement, based on the delaying, a drx-HARQ-RTT-TimerDL. According toan example embodiment, the wireless device may increment, based on thedelaying, a drx-HARQ-RTT-TimerUL. According to an example embodiment,the wireless device may increment, based on the delaying, adrx-RetransmissionTimerDL. According to an example embodiment, thewireless device may increment, based on the delaying, adrx-RetransmissionTimerUL. According to an example embodiment, theincrementing the duration may comprise incrementing the duration by atime value that is a difference between the completion time and a timethat the processing of the second RRC message is completed.

According to an example embodiment, the delaying the first change of thefirst active BWP may comprise starting switching the first active BWP ofthe first cell to a BWP of the first cell based on the completion time.According to an example embodiment, the second RRC message may indicatethe BWP for the first change. According to an example embodiment, theswitching the first active BWP to the BWP based on the completion timemay comprise switching the first active BWP to the BWP at a firstsubframe after the completion time. According to an example embodiment,the switching the first active BWP to the BWP based on the completiontime may comprise switching the first active BWP to the BWP at a firsthalf subframe after the completion time.

According to an example embodiment, a bandwidth part inactivity timer ofthe first cell may be started: after the delaying the first change ofthe first active BWP; and before the completion time of the secondchange. According to an example embodiment, the first change may becancelled based on the starting the bandwidth part inactivity timer.According to an example embodiment, the cancelling the first change maycomprise not starting switching of the first active BWP to the BWP basedon the completion time. According to an example embodiment thecancelling the first change may comprise refraining from switching thefirst active BWP to the BWP. According to an example embodiment, thecancelling the first change may comprise keeping the first active BWP asan active BWP of the first cell.

According to an example embodiment, the determining that the completingoccurs during the time duration may comprise determining that thecompleting occurs in a time slot different from a first slot of a set ofslots of the first cell that overlaps with the time duration.

According to an example embodiment, the first active BWP may bedeactivated based on the delaying.

According to an example embodiment, the wireless device may nottransmit, via the first active BWP based on the delaying the firstchange of the first active BWP, an uplink shared channel. According toan example embodiment, the wireless device may not transmit, via thefirst active BWP based on the delaying the first change of the firstactive BWP, a random-access channel. According to an example embodiment,the wireless device may not transmit, via the first active BWP based onthe delaying the first change of the first active BWP, an uplink controlchannel. According to an example embodiment, the wireless device may nottransmit, via the first active BWP based on the delaying the firstchange of the first active BWP, a channel state information report.According to an example embodiment, the wireless device may nottransmit, via the first active BWP based on the delaying the firstchange of the first active BWP, a sounding reference signal.

According to an example embodiment, the wireless device may not monitora downlink control channel via the first active BWP based on thedelaying the first change of the first active BWP. According to anexample embodiment, the wireless device may not receive a downlinkshared channel via the first active BWP based on the delaying the firstchange of the first active BWP.

According to an example embodiment, the wireless device, based on thedelaying the first change of the first active BWP, may not start abandwidth part inactivity timer of the first cell until the secondchange of the second active BWP is completed.

According to an example embodiment, the wireless device may stop, basedon the delaying the first change of the first active BWP, a configuredgrant timer. According to an example embodiment, the wireless device maystop, based on the delaying the first change of the first active BWP, adrx-HARQ-RTT-TimerDL. According to an example embodiment, the wirelessdevice may stop, based on the delaying the first change of the firstactive BWP, a drx-HARQ-RTT-TimerUL. According to an example embodiment,the wireless device may stop, based on the delaying the first change ofthe first active BWP, a drx-RetransmissionTimerDL. According to anexample embodiment, the wireless device may stop, based on the delayingthe first change of the first active BWP, a drx-RetransmissionTimerUL.

According to an example embodiment, a wireless device may receive one ormore messages. The one or more messages may comprise one or moreconfiguration parameters of a first cell and a second cell. A radioresource control (RRC) message indicating a first change of a firstactive bandwidth part (BWP) of the first cell may be received. Thewireless device may complete processing of the RRC message. Adetermination may be made that the completing occurs in a time slotdifferent from a first slot of a set of slots of the first cell thatoverlaps with a time duration of a second change of a second active BWPof the second cell. Based on the determination, the first change of thefirst active BWP may be delayed until the second change of the secondactive BWP is completed.

According to an example embodiment, a wireless device may receive one ormore messages. The one or more messages may comprise one or moreconfiguration parameters of a first cell. The one or more messages maycomprise one or more configuration parameters of a second cell. A firstchange of a first active bandwidth part (BWP) of the first cell may betriggered. A determination may be made that the triggering the firstchange occurs in a time duration of a second change of a second activeBWP of the second cell. Based on the determination, a configuredtransmission of a transport block via the first active BWP may bestopped until the second change of the second active BWP is completed.

According to an example embodiment, the transport block may be a mediumaccess control protocol data unit (MAC PDU) in a configured uplinkgrant.

According to an example embodiment, a base station may determine that afirst change of a first active bandwidth part (BWP) of a first cell:starts in a first time slot; and completes in the first time slot plus afirst delay for the first change. According to an example embodiment,based on the determining, the base station may transmit a radio resourcecontrol (RRC) message indicating a second change of a second active BWPof a second cell a second time delay prior the first time slot. Thesecond time delay may be a processing delay of the RRC message plus asecond delay for the second change. According to an example embodiment,based on the determining, the base station may transmit a radio resourcecontrol (RRC) message indicating a second change of a second active BWPof a second cell after the first time slot plus the first delay minus aprocessing delay of the RRC message.

Embodiments may be configured to operate as needed. The disclosedmechanism may be performed when certain criteria are met, for example,in a wireless device, a base station, a radio environment, a network, acombination of the above, and/or the like. Example criteria may bebased, at least in part, on for example, wireless device or network nodeconfigurations, traffic load, initial system set up, packet sizes,traffic characteristics, a combination of the above, and/or the like.When the one or more criteria are met, various example embodiments maybe applied. Therefore, it may be possible to implement exampleembodiments that selectively implement disclosed protocols.

A base station may communicate with a mix of wireless devices. Wirelessdevices and/or base stations may support multiple technologies, and/ormultiple releases of the same technology. Wireless devices may have somespecific capability(ies) depending on wireless device category and/orcapability(ies). A base station may comprise multiple sectors. When thisdisclosure refers to a base station communicating with a plurality ofwireless devices, this disclosure may refer to a subset of the totalwireless devices in a coverage area. This disclosure may refer to, forexample, a plurality of wireless devices of a given LTE or 5G releasewith a given capability and in a given sector of the base station. Theplurality of wireless devices in this disclosure may refer to a selectedplurality of wireless devices, and/or a subset of total wireless devicesin a coverage area which perform according to disclosed methods, and/orthe like. There may be a plurality of base stations or a plurality ofwireless devices in a coverage area that may not comply with thedisclosed methods, for example, because those wireless devices or basestations perform based on older releases of LTE or 5G technology.

In this disclosure, “a” and “an” and similar phrases are to beinterpreted as “at least one” and “one or more.” Similarly, any termthat ends with the suffix “(s)” is to be interpreted as “at least one”and “one or more.” In this disclosure, the term “may” is to beinterpreted as “may, for example.” In other words, the term “may” isindicative that the phrase following the term “may” is an example of oneof a multitude of suitable possibilities that may, or may not, beemployed to one or more of the various embodiments.

If A and B are sets and every element of A is also an element of B, A iscalled a subset of B. In this specification, only non-empty sets andsubsets are considered. For example, possible subsets of B={cell1,cell2} are: {cell1}, {cell2}, and {cell1, cell2}. The phrase “based on”(or equally “based at least on”) is indicative that the phrase followingthe term “based on” is an example of one of a multitude of suitablepossibilities that may, or may not, be employed to one or more of thevarious embodiments. The phrase “in response to” (or equally “inresponse at least to”) is indicative that the phrase following thephrase “in response to” is an example of one of a multitude of suitablepossibilities that may, or may not, be employed to one or more of thevarious embodiments. The phrase “depending on” (or equally “depending atleast to”) is indicative that the phrase following the phrase “dependingon” is an example of one of a multitude of suitable possibilities thatmay, or may not, be employed to one or more of the various embodiments.The phrase “employing/using” (or equally “employing/using at least”) isindicative that the phrase following the phrase “employing/using” is anexample of one of a multitude of suitable possibilities that may, or maynot, be employed to one or more of the various embodiments.

The term configured may relate to the capacity of a device whether thedevice is in an operational or non-operational state. Configured mayalso refer to specific settings in a device that effect the operationalcharacteristics of the device whether the device is in an operational ornon-operational state. In other words, the hardware, software, firmware,registers, memory values, and/or the like may be “configured” within adevice, whether the device is in an operational or nonoperational state,to provide the device with specific characteristics. Terms such as “acontrol message to cause in a device” may mean that a control messagehas parameters that may be used to configure specific characteristics ormay be used to implement certain actions in the device, whether thedevice is in an operational or non-operational state.

In this disclosure, various embodiments are disclosed. Limitations,features, and/or elements from the disclosed example embodiments may becombined to create further embodiments within the scope of thedisclosure.

In this disclosure, parameters (or equally called, fields, orInformation elements: IEs) may comprise one or more information objects,and an information object may comprise one or more other objects. Forexample, if parameter (IE) N comprises parameter (IE) M, and parameter(IE) M comprises parameter (IE) K, and parameter (IE) K comprisesparameter (information element) J. Then, for example, N comprises K, andN comprises J. In an example embodiment, when one or more messagescomprise a plurality of parameters, it implies that a parameter in theplurality of parameters is in at least one of the one or more messages,but does not have to be in each of the one or more messages.

Furthermore, many features presented above are described as beingoptional through the use of “may” or the use of parentheses. For thesake of brevity and legibility, the present disclosure does notexplicitly recite each and every permutation that may be obtained bychoosing from the set of optional features. However, the presentdisclosure is to be interpreted as explicitly disclosing all suchpermutations. For example, a system described as having three optionalfeatures may be embodied in seven different ways, namely with just oneof the three possible features, with any two of the three possiblefeatures or with all three of the three possible features.

Many of the elements described in the disclosed embodiments may beimplemented as modules. A module is defined here as an element thatperforms a defined function and has a defined interface to otherelements. The modules described in this disclosure may be implemented inhardware, software in combination with hardware, firmware, wetware (i.e.hardware with a biological element) or a combination thereof, all ofwhich may be behaviorally equivalent. For example, modules may beimplemented as a software routine written in a computer languageconfigured to be executed by a hardware machine (such as C, C++,Fortran, Java, Basic, Matlab or the like) or a modeling/simulationprogram such as Simulink, Stateflow, GNU Octave, or LabVIEWMathScript.Additionally, it may be possible to implement modules using physicalhardware that incorporates discrete or programmable analog, digitaland/or quantum hardware. Examples of programmable hardware comprise:computers, microcontrollers, microprocessors, application-specificintegrated circuits (ASICs); field programmable gate arrays (FPGAs); andcomplex programmable logic devices (CPLDs). Computers, microcontrollersand microprocessors are programmed using languages such as assembly, C,C++ or the like. FPGAs, ASICs and CPLDs are often programmed usinghardware description languages (HDL) such as VHSIC hardware descriptionlanguage (VHDL) or Verilog that configure connections between internalhardware modules with lesser functionality on a programmable device. Theabove mentioned technologies are often used in combination to achievethe result of a functional module.

The disclosure of this patent document incorporates material which issubject to copyright protection. The copyright owner has no objection tothe facsimile reproduction by anyone of the patent document or thepatent disclosure, as it appears in the Patent and Trademark Officepatent file or records, for the limited purposes required by law, butotherwise reserves all copyright rights whatsoever.

While various embodiments have been described above, it should beunderstood that they have been presented by way of example, and notlimitation. It will be apparent to persons skilled in the relevantart(s) that various changes in form and detail can be made thereinwithout departing from the scope. In fact, after reading the abovedescription, it will be apparent to one skilled in the relevant art(s)how to implement alternative embodiments. Thus, the present embodimentsshould not be limited by any of the above described exemplaryembodiments.

In addition, it should be understood that any figures which highlightthe functionality and advantages, are presented for example purposesonly. The disclosed architecture is sufficiently flexible andconfigurable, such that it may be utilized in ways other than thatshown. For example, the actions listed in any flowchart may bere-ordered or only optionally used in some embodiments.

Further, the purpose of the Abstract of the Disclosure is to enable theU.S. Patent and Trademark Office and the public generally, andespecially the scientists, engineers and practitioners in the art whoare not familiar with patent or legal terms or phraseology, to determinequickly from a cursory inspection the nature and essence of thetechnical disclosure of the application. The Abstract of the Disclosureis not intended to be limiting as to the scope in any way.

Finally, it is the applicant's intent that only claims that include theexpress language “means for” or “step for” be interpreted under 35U.S.C. 112. Claims that do not expressly include the phrase “means for”or “step for” are not to be interpreted under 35 U.S.C. 112.

What is claimed is:
 1. A method comprising: receiving, by a wirelessdevice, one or more first radio resource control (RRC) messagescomprising one or more configuration parameters of a first cell and asecond cell; receiving a second RRC message indicating a first change ofa first active bandwidth part (BWP) of the first cell; completingprocessing of the second RRC message; determining that the completingoccurs during a time duration of a second change of a second active BWPof the second cell; and delaying, based on the determining, the firstchange of the first active BWP until the second change of the secondactive BWP is completed.
 2. The method of claim 1, further comprisingnot receiving and not transmitting, for the second change of the secondactive BWP, in the second cell within the time duration.
 3. The methodof claim 1, further comprising completing the second change of thesecond active BWP in a completion time.
 4. The method of claim 3,further comprising starting, at the completion time, at least one of: aconfigured grant timer; a drx-HARQ-RTT-TimerDL; drx-HARQ-RTT-TimerUL;drx-RetransmissionTimerDL; and drx-RetransmissionTimerUL.
 5. The methodof claim 3, further comprising incrementing, based on the delaying, aduration of at least one of: a configured grant timer; adrx-HARQ-RTT-TimerDL; drx-HARQ-RTT-TimerUL; drx-RetransmissionTimerDL;and drx-RetransmissionTimerUL.
 6. The method of claim 5, wherein theincrementing the duration comprises incrementing the duration by a timevalue that is a difference between the completion time and a time thatthe processing of the second RRC message is completed.
 7. The method ofclaim 3, wherein the delaying comprises starting switching the firstactive BWP of the first cell to a BWP of the first cell based on thecompletion time.
 8. The method of claim 7, wherein the switching thefirst active BWP to the BWP based on the completion time comprisesswitching the first active BWP to the BWP at a first subframe after thecompletion time.
 9. The method of claim 7, wherein the switching thefirst active BWP to the BWP based on the completion time comprisesswitching the first active BWP to the BWP at a first half subframe afterthe completion time.
 10. The method of claim 3, further comprisingstarting a bandwidth part inactivity timer of the first cell: after thedelaying the first change; and before the completion time of the secondchange.
 11. The method of claim 10, further comprising cancelling thefirst change based on the starting the bandwidth part inactivity timer.12. The method of claim 11, wherein the cancelling the first changecomprises not starting switching of the first active BWP to the BWPbased on the completion time.
 13. The method of claim 1, wherein thedetermining that the completing occurs during the time durationcomprises determining that the completing occurs in a time slotdifferent from a first slot of a set of slots of the first cell thatoverlaps with the time duration.
 14. The method of claim 1, furthercomprising deactivating the first active BWP based on the delaying. 15.The method of claim 1, further comprising not transmitting, via thefirst active BWP based on the delaying, at least one of the following:an uplink shared channel; a random-access channel; an uplink controlchannel; a channel state information report; and a sounding referencesignal.
 16. The method of claim 1, further comprising at least one ofthe following: not monitoring a downlink control channel via the firstactive BWP based on the delaying; and not receiving a downlink sharedchannel via the first active BWP based on the delaying.
 17. The methodof claim 1, further comprising based on the delaying, not starting abandwidth part inactivity timer of the first cell until the secondchange of the second active BWP is completed.
 18. The method of claim 1,further comprising stopping, based on the delaying, at least one of: aconfigured grant timer; a drx-HARQ-RTT-TimerDL; drx-HARQ-RTT-TimerUL;drx-RetransmissionTimerDL; and drx-RetransmissionTimerUL.
 19. A wirelessdevice comprising: one or more processors; and memory storinginstructions that, when executed by the one or more processors, causethe wireless device to: receive one or more first radio resource control(RRC) messages comprising one or more configuration parameters of afirst cell and a second cell; receive a second RRC message indicating afirst change of a first active bandwidth part (BWP) of the first cell;complete processing of the second RRC message; determine that thecompletion occurs during a time duration of a second change of a secondactive BWP of the second cell; and delay, based on the determination,the first change of the first active BWP until the second change of thesecond active BWP is completed.
 20. A system comprising: a base stationcomprising: one or more processors; and memory storing instructionsthat, when executed by the one or more processors of the base station,cause the base station to: transmit one or more first radio resourcecontrol (RRC) messages comprising one or more configuration parametersof a first cell and a second cell; transmit a second RRC messageindicating a first change of a first active bandwidth part (BWP) of thefirst cell; a wireless device comprising: one or more processors; andmemory storing instructions that, when executed by the one or moreprocessors of the wireless device, cause the wireless device to: receivethe one or more first RRC messages; receive the second RRC message;complete processing of the second RRC message; determine that thecompletion occurs during a time duration of a second change of a secondactive BWP of the second cell; and delay, based on the determination,the first change of the first active BWP until the second change of thesecond active BWP is completed.